definition of critical thinking in philosophy

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1: Introduction to Critical Thinking, Reasoning, and Logic

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What is thinking? It may seem strange to begin a logic textbook with this question. ‘Thinking’ is perhaps the most intimate and personal thing that people do. Yet the more you ‘think’ about thinking, the more mysterious it can appear. It is the sort of thing that one intuitively or naturally understands, and yet cannot describe to others without great difficulty. Many people believe that logic is very abstract, dispassionate, complicated, and even cold. But in fact the study of logic is nothing more intimidating or obscure than this: the study of good thinking.

• 1.1: Prelude to Chapter
• 1.2: Introduction and Thought Experiments- The Trolley Problem
• 1.3: Truth and Its Role in Argumentation - Certainty, Probability, and Monty Hall Only certain sorts of sentences can be used in arguments. We call these sentences propositions, statements or claims.
• 1.4: Distinction of Proof from Verification; Our Biases and the Forer Effect
• 1.5: The Scientific Method The procedure that scientists use is also a standard form of argument. Its conclusions only give you the likelihood or the probability that something is true (if your theory or hypothesis is confirmed), and not the certainty that it’s true. But when it is done correctly, the conclusions it reaches are very well-grounded in experimental evidence.
• 1.6: Diagramming Thoughts and Arguments - Analyzing News Media
• 1.7: Creating a Philosophical Outline

Critical Thinking: A Streamlined Conception

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• Robert H. Ennis  

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Critical thinking under that name was inspired by pragmatic philosopher John Dewey (1910) and endorsed by analytic philosopher Max Black (1946). Dewey was revered by the progressive educators, who re-labeled his “reflective thinking” as “critical thinking,” a name I believe they originated and that persists to the present (see Aiken (1942) for a mixture of both terms). Black (1946), insofar as I can determine, wrote the first college text including the words “critical thinking” in the title.

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Ennis, R.H. (2015). Critical Thinking: A Streamlined Conception. In: Davies, M., Barnett, R. (eds) The Palgrave Handbook of Critical Thinking in Higher Education. Palgrave Macmillan, New York. https://doi.org/10.1057/9781137378057_2

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Defining Critical Thinking

1000-Word Philosophy: An Introductory Anthology

Philosophy, One Thousand Words at a Time

Critical Thinking: What is it to be a Critical Thinker?

Author: Carolina Flores Categories: Logic and Reasoning , Philosophy of Education , Epistemology, or Theory of Knowledge Word count: 997

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We often urge others to think critically. What does that really mean? How can we think critically?

This essay presents a general account of what it is to be a critical thinker and outlines both traditional and more recent approaches to critical thinking.

1. What is Critical Thinking?

Speaking generally, critical thinking consists of reasoning and inquiring in careful ways, so as to form and update one’s beliefs based on good reasons . [1] A critical thinker is someone who typically reasons and inquires in these ways, having mastered relevant skills and developed the disposition to apply them. [2]

2. Traditional Components: Logic and Fallacies

Traditional views of critical thinking focus on deductive arguments. Arguments are sets of reasons given for a conclusion. Deductive arguments are arguments where the reasons given are supposed to be logically conclusive, that is, to guarantee the conclusion. E.g., the following is a deductive argument:

• Socrates is a man.
• All men are mortal.
• Therefore, Socrates is mortal.

Arriving at new beliefs through deductive arguments is a way of forming beliefs based on good reasons. Accordingly, critical thinking traditionally focusses on these skills: [3]

• distinguishing arguments (instances where you are offered reasons for a conclusion) from mere assertions, rhetorical questions, and attempts at manipulation through irrelevant considerations;
• identifying conclusions of arguments (what the person offering the argument wants to persuade you to believe), and the reasons or premises for that conclusion;
• reconstructing streamlined, complete statements of arguments in standard form (as a numbered list of premises with the conclusion at the end), or using diagrams; [4]
• assessing the logical structure of deductive arguments: answering ‘Is there any way for the premises to be true while the conclusion is false?’
• understanding arguments’ claims: e.g., defining unclear terms;
• determining whether premises are true or likely;
• imagining, proposing, and charitably responding to objections, i.e, reasons given to doubt or deny arguments’ logic, premise(s), or conclusion. [5]

To develop these skills, traditional critical thinking courses typically include propositional logic and the study of common good argument forms. [6]

They also often teach how to identify fallacies —faulty patterns of reasoning that deceptively appear to be good arguments. [7] These include:

• affirming the consequent (“If Kat had won the prize, she would have had an A; Kat had an A; therefore, Kat won the prize”);
• the ad hominem fallacy—where people attack the person making an argument instead of considering their argument;
• begging the question —offering reasons for a conclusion that assume the conclusion, and many others. [8]

3. Additional Formal Tools: Evidence and Statistics

We often form beliefs based on observations that, unlike deductive arguments, do not provide conclusive reasons for a belief: e.g., you might conclude that your sibling is angry at you from their facial expressions or come to believe you have a cold because you have a runny nose. Here, these observations or evidence might support the belief formed but do not guarantee the truth of your belief.

Critical thinkers know how to adjust their beliefs appropriately in light of their evidence. [9] So critical thinking requires developing abilities to:

• assess evidence without being unduly swayed by what one already believes;
• recognize when a claim counts as evidence for (or against) a conclusion;
• identify when evidence is strong (or weak);
• determine the extent to which people’s views should change, given their evidence.

To develop these abilities, drawing on knowledge of probability can be helpful: e.g., basic probability offers a recipe for determining when an observation counts as evidence for a belief: when that observation is more likely if the belief is true than if it is not . It also teaches us that updating your beliefs when you get new evidence requires taking into account both (a) how confident you were on that belief beforehand and (b) how strongly the evidence supports that (new) belief. [10]

For these reasons, recent approaches to critical thinking often include instruction in probability. [11] And, because we often get evidence in the form of statistics, often presented through diagrams and graphs, such approaches tend to highlight the importance of basic statistical concepts, [12] and the ability to interpret diagrams and graphs. [13]

4. Applied Skills as Part of Being a Critical Thinker

Being a critical thinker requires more than having technical tools (such as the tools of logic or probability) stored away. It requires consistently applying them in the real world .

In recent discussions of what it is to be a critical thinker, there has been increased emphasis on navigating our informational environments in savvy ways. This requires avoiding false, misleading, manipulative, or distracting claims online, as well as making sure that one gathers information from a wide variety of reliable sources. [14] It also requires calibrating one’s trust well: one should remain open to hearing those who disagree and not let prejudice and implicit bias affect whom one trusts. [15] , [16]

Applying the tools of critical thinking throughout one’s life requires overcoming cognitive biases: [17] e.g.:

• not always accepting answers that come to mind first;
• resisting confirmation bias (the tendency to gather and interpret evidence in ways that confirm our beliefs), [18] and;
• avoiding motivated reasoning (the tendency to reason in ways that help us believe what we wish were true, and not what is true). [19]

More generally, becoming a critical thinker requires shifting from a defensive mindset to a truth-seeking one and developing intellectual virtues such as intellectual humility and open-minded curiosity. [20] , [21] Without those, the tools of critical thinking may end up being deployed to entrench false or unreasonable beliefs.

5. Conclusion

Critical thinking is about reasoning and inquiring so as to form and update one’s beliefs based on good reasons. Because critical thinking skills are valuable in a world that emphasizes the ability to navigate information, becoming a critical thinker is practically useful to us as individuals.

It is also of crucial social and political value: e.g., a well-functioning democracy requires citizens who think critically about the world. [22] And critical thinking has liberatory potential: it provides us with tools to criticize oppressive social structures and envisage a more just, fair society. [23]

Acknowledgments

Thanks to the Teaching Philosophy Facebook Group for literature recommendations. Thanks to Chelsea Haramia, Sabrina Huwang, Izilda Jorge, Thomas Metcalf, Nathan Nobis, Elise Woodard, and anonymous referees for feedback.

[1] This definition is similar to Ennis’s (1991) definition: critical thinking, in his view, is “reasonable reflective thinking that is focused on deciding what to believe or do” (Ennis 1991, p. 6). See Hitchcock 2010 for an overview of definitions of critical thinking. 

[2] While I define critical thinking in a general way here, there is disagreement about whether there are any general tools for critical thinking, as opposed to merely topic-specific ones.

There are also closely related debates about the extent to which specific critical thinking skills transfer to new domains and tasks, and about whether we should teach critical thinking on its own or, instead, in the context of specific disciplines, with discipline-internal standards made clear and an emphasis on content acquisition. See Willingham 2019 for discussion, including references to relevant empirical research.

People who have mastered critical thinking skills in a domain or subject area tend to be experts in those areas. See Expertise: What is an Expert? by Jamie Carlin Watson

[3] See this Khan Academy/Wi Phi Philosophy course for an overview.

[4] An example of an argument in standard form is: 1. Socrates is a man; 2. All men are mortal; 3. Therefore, Socrates is mortal. For other examples of arguments in standard form, see Anderson’s “Putting an Argument in Standard Form.” For examples of argument diagrams, as well as a useful program to construct such diagrams, see Cullen’s “Philosophy Mapped” website .

[5] Charitably responding involves responding to the strongest version of the objection.

[6] Propositional logic is the simplest branch of logic, i.e. the formal study of arguments and reasoning. See Tom Metcalf’s Formal Logic: Symbolizing Arguments in Sentential Logic by for an introduction.

[7] Wikipedia has extensive lists of good argument forms and of common fallacies . See Boardman et al. 2017, Howard-Snyder 2020, Lau 2011 , Vaughn 2018 for examples of critical thinking textbooks that take the traditional approach.

[8] To see why these are fallacies, note that, for all that is said, Kat could have had an A without winning the prize; perhaps she simply had high exam scores. And note that morally bad people can give good arguments.

[9] Philosophers also use the term ‘evidence’ in more technical senses than ‘relevant observations’. See Kelly 2016 for discussion of these different senses.

[10] Indeed, we can capture this insight into a domain-general formula for how to update beliefs: Bayes’ theorem. Bayes’ theorem tells us how to weigh our previous confidence and the strength of evidence. For a short explanation of Bayes’ Theorem, see Better Explained, “A Short and Intuitive Explanation of Bayes’ Theorem” . For more detailed discussion of Bayesianism, see Joyce 2019.

[11] Manley 2019.

[12] See Gigerenzer et al. 2007 for discussion of the practical importance of these concepts. An especially important statistical concept is that of base rate . The base rate of a feature in a population is what fraction of the population have that feature. Neglecting the base rate leads to the base rate fallacy , where one ends up adjusting one’s beliefs incorrectly in response to evidence (for example, taking a fallible positive test for a rare disease to indicate that one is extremely likely to have that disease, where, given the rarity of the disease, that remains unlikely).

[13] Battersby 2016.

[14] See Bergstorm and West’s “Calling Bullshit” syllabus for a range of helpful tools for avoiding such claims, and The News Literacy Project for resources on developing a healthy news diet.

[15] See Nguyen’s “Escape the Echo Chamber.” for helpful discussion of common issues with trust calibration and with information gathering.

[16] Implicit bias involves believing and acting “on basis of prejudice and stereotypes without intending to do so”: see Brownstein 2019.

When one discredits members of marginalized groups due to (conscious or unconscious) prejudice, one commits an epistemic injustice: see Fricker 2007. For an introduction to epistemic injustice, see Huzeyfe Demitras’s Epistemic Injustice .

[17] Cognitive biases are systematic deviations from how we should reason. See Kahneman 2011 for an accessible overview of research on cognitive biases.

[18] Nickerson 1998 .

[19] Kunda 1990.

[20] An intellectual virtue is a personality trait or disposition that is helpful in reasoning well and acquiring knowledge. Some examples are intellectual humility, open-mindedness, curiosity, and perseverance. See Zagzebski 1996.

[21] See Galef’s TED talk “Why you think you’re right – even if you’re wrong” for discussion of the importance of these traits.

[22] Dewey 1923.

[23] Freire 1968/2018, hooks 2010.

Anderson, Jeremy. “Putting an Argument in Standard Form.”

Battersby, Mark. 2016. Is That a Fact?: A Field Guide to Statistical and Scientific Information . Broadview Press.

Bergstrom, Carl T. and West, Jevin. 2019. “Calling Bullshit: Data Reasoning in a Digital World.” (website)

Better Explained. 2020. “A Short and Intuitive Explanation of Bayes’ Theorem.” (website)

Boardman, Frank, Cavender, Nancy M, and Kahane, Howard . 2017. Logic and Contemporary Rhetoric: The Use of Reason in Everyday Life. Cengage Learning.

Brownstein, Michael, “Implicit Bias”, The Stanford Encyclopedia of Philosophy (Fall 2019 Edition), Edward N. Zalta (ed.).

Cullen, Simon. “Philosophy Mapped: Open Resources for Philosophy Visualization.” 

Demirtas, Huzeyfe. 2020. “Epistemic Injustice.” 1000-Word Philosophy: An Introductory Anthology .

Dewey, John. 1923. Democracy and Education: An Introduction to the Philosophy of Education. Macmillan.

Ennis, Robert. 1991. “Critical Thinking: A Streamlined Conception.” Teaching Philosophy , 14(1):5-24.

Frankfurt, Harry G. 1986. On Bullshit . Princeton University Press.

Freire, Paulo. 2018 [1968]. Pedagogy of the Oppressed . Bloomsbury Publishing USA.

Fricker, Miranda. 2007. Epistemic Injustice: Power and the Ethics of Knowing . Oxford University Press.

Galef, Julia. 2016. “Why You Think You’re Right – Even If You’re Wrong.” TED Talk.

Gigerenzer, Gerd, Gaissmaier, Wolfgang, Kurz-Milcke, Elke, Schwartz, Lisa M and Woloshin, Steven. 2007. “Helping Doctors and Patients Make Sense of Health Statistics.” Psychological Science in the Public Interest , 8(2):53-96.

bell hooks. 2010. Teaching Critical Thinking: Practical Wisdom . New York and London: Routledge.

Hitchcock, David. 2020. “ Critical Thinking ” , The Stanford Encyclopedia of Philosophy (Fall 2020 Edition), Edward N. Zalta (ed.).

Howard-Snyder, Frances, Howard-Snyder, Daniel, and Wasserman, Ryan. 2020. The Power of Logic . McGraw-Hill.

Joyce, James, “ Bayes’ Theorem ” , The Stanford Encyclopedia of Philosophy (Spring 2019 Edition), Edward N. Zalta (ed.).

Kahneman, Daniel. 2011. Thinking, Fast and Slow . Macmillan.

Kelly, Thomas. 2016. “ Evidence ” , The Stanford Encyclopedia of Philosophy (Winter 2016 Edition), Edward N. Zalta (ed.).

Kunda, Ziva. 1990. “The Case for Motivated Reasoning.” Psychological Bulletin , 108(3):  480-498.

Lai, Emily R. 2011. “Critical Thinking: A Literature Review.” Pearson’s Research Reports , 6: 40-41.

Lau, Joe YF. 2011. An Introduction to Critical Thinking and Creativity: Think More, Think Better . John Wiley & Sons.

Manley, David. 2019. Reason Better: An Interdisciplinary Guide to Critical Thinking . Toronto, ON, Canada: Tophat Monocle.

Metcalf, Thomas. 2020. “Formal Logic: Symbolizing Arguments in Sentential Logic.” 1,000-Word Philosophy: An Introductory Anthology .

The News Literacy Project.

Nguyen, Thi. 2018. “Escape the Echo Chamber.” Aeon.

Nickerson, Raymond S. 1998. “Confirmation Bias: A Ubiquitous Phenomenon in Many Guises.” Review of General Psychology , 2(2):175-220.

Pynn, Geoff. 2020. “Critical Thinking: Fundamentals.” Wireless Philosophy/Khan Academy .

Vaughn, Lewis. 2018. The Power of Critical Thinking: Effective Reasoning About Ordinary and Extraordinary Claims . Oxford University Press.

Willingham, Daniel T. 2019. “How to Teach Critical Thinking.” Education: Future Frontiers , 1:1-17.

Zagzebski, Linda Trinkaus. 1996. Virtues of the Mind: An Inquiry into the Nature of Virtue and the Ethical Foundations of Knowledge . Cambridge University Press.

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About the Author

Carolina Flores is a post-doctoral fellow at UC Irvine and will be an assistant professor at UC Santa Cruz starting in 2023. She earned her Ph.D. at Rutgers University, New Jersey. She specializes in philosophy of mind and social epistemology. She is especially interested in why it is so hard to change people’s minds, and in what that tells us about the mind and about human relationships and political persuasion. CarolinaFlores.org

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Critical Thinking

I. definition.

Critical thinking is the ability to reflect on (and so improve ) your thoughts, beliefs, and expectations. It’s a combination of several skills and habits such as:

Curiosity : the desire for knowledge and understanding

Curious people are never content with their current understanding of the world, but are driven to raise questions and pursue the answers. Curiosity is endless — the better you understand a given topic, the more you realize how much more there is to learn!

Humility : or the recognition that your own understanding is limited

This is closely connected to curiosity — if you’re arrogant and think you know everything already, then you have no reason to be curious. But a humble person always recognizes the limitations and gaps in their knowledge . This makes them more receptive to information, better listeners and learners.

Skepticism : a suspicious attitude toward what other people say

Skepticism means you always demand evidence and don’t simply accept what others tell you. At the same time, skepticism has to be inwardly focused as well! You have to be equally skeptical of your own beliefs and instincts as you are of others’.

Rationality or logic: The formal skills of logic are indispensable for critical thinkers

Skepticism keeps you on the lookout for bad arguments, and rationality helps you figure out exactly why they’re bad. But rationality also allows you to identify good arguments when you see them, and then to move beyond them and understand their further implications.

Creativity: or the ability to come up with new combinations of ideas

It’s not enough to just be skeptical and knock the holes in every argument that you hear. Sooner or later you have to come up with your own ideas, your own solutions, and your own visions. That requires a creative and independent mind, but one that is also capable of listening and learning.

Empathy : the ability to see things from another person’s perspective

Too often, people talk about critical thinkers as though they’re solitary explorers, forging their own path through the jungle of ideas without help from others. But this isn’t true at all. Real critical thinking means you constantly engage with other people, listen to what they have to say, and try to imagine how they see the world. By seeing things from someone else’s perspective, you can generate far more new ideas than you could by relying on your own knowledge alone.

II. Examples

Although video games are sometimes simply a passive way to enjoy yourself, they sometimes rely on critical thinking skills. This is particularly true of puzzle games and role playing games (RPGs) that present your character with puzzles at critical moments. For example, at one stage in the classic RPG Neverwinter Nights , your character has the option to serve as a juror on another character’s trial. In order to save the innocent man, you have to talk to people throughout the town and, using a combination of empathy and skepticism, figure out what really happened.

In one episode of South Park , Cartman becomes obsessed with conspiracy theories and sings a song about needing to think for himself and find out the truth. The show is poking fun at conspiracy theorists, who often think that they are exercising critical thinking when in fact they are simply exercising too much skepticism towards common sense and popular beliefs, and not enough skepticism towards new, unnecessarily complicated explanations.

III. Critical Thinking vs. Traditional Thinking

Critical thinking, in the history of modern Western thought, is strongly associated with the Enlightenment, the period when European and American philosophers decided to approach the world with a rational eye, rejecting blind faith and questioning traditional authority. It was this moment in history that gave us modern medicine, democracy , and the early forms of industrial technology.

At the same time, the Enlightenment also came with many downsides, particularly the fact that it was so hostile to tradition. This hostility is understandable given the state of Europe at the time — ripped apart by bloody conflict between different religions, and oppressed by traditional monarchs who rooted their power in that of the Church. Enlightenment thinkers understandably rejected traditional thinking, holding it responsible for all this violence and injustice. But still, the Enlightenment sometimes went too far in the opposite direction. After all, rejecting tradition just for the sake of rejecting it is not really any better than accepting tradition just for the sake of accepting it! Traditions provide valuable resources for critical thinking, and without them it would be impossible. Think about this: the English language is a tradition, and without it you wouldn’t be sitting there reading these (hopefully useful) words about critical thinking!

So critical thinking absolutely depends on traditions. There’s no question that critical thinking means something more than just accepting traditions; but it doesn’t mean you necessarily reject them, either. It just means that you’re not blindly following tradition for its own sake ; rather, your relationship to your tradition is based on humility, creativity, skepticism, and all the other attributes of critical thinking.

IV. Quotes about Critical Thinking

“If I have seen further than others, it is because I have stood on the shoulders of giants.” (Isaac Newton)

Until Einstein, no physicist was ever more influential than Isaac Newton. Through curiosity and probable skepticism, he not only worked out the basic rules for matter and energy in the universe — he also realized that the force causing objects to fall was the same as the force causing celestial objects to orbit around each other (thus discovering the modern theory of gravity). He was also known for having a big ego and being a little arrogant with those he considered beneath his intellect — but even Newton had enough humility to recognize that he wasn’t doing it alone. He was deeply indebted to the whole tradition of scientists that had come before him — Europeans, Greeks, Arabs, Indians, and all the rest.

“It seems to me what is called for is an exquisite balance between two conflicting needs: the most skeptical scrutiny of all hypotheses… and at the same time a great openness to new ideas. Obviously those two modes of thought are in some tension. But if you are able to exercise only one of these modes, whichever one it is, you’re in deep trouble.” (Carl Sagan, The Burden of Skepticism )

In this quote, Carl Sagan offers a sensitive analysis of a tension within the idea of critical thinking. He points out that skepticism is extremely important to critical thinking, but at the same time it can go too far and become an obstacle. Notice, too, that you could replace the word “new” with “old” in this quote and it would still make sense. Critical thinkers need to be both open to new ideas and skeptical of them; similarly, they need to have a balanced attitude toward old and traditional ideas as well.

V. The History and Importance of Critical Thinking

Critical thinking has emerged as a cultural value in various times and places, from the Islamic scholars of medieval Central Asia to the secular philosophers of 18th-century America or the scientists and engineers of 21st-century Japan. In each case, critical thinking has taken a slightly different form, sometimes emphasizing skepticism above the other dimensions (as occurred in the European Enlightenment), sometimes emphasizing other dimensions such as creativity or rationality.

Today, many leaders in science, education, and business worry that we are seeing a decline in critical thinking. Education around the world has turned increasingly toward standardized testing and the mechanical memorization of facts, an approach that doesn’t leave time for critical thinking or creative arts. Some politicians view critical and creative education as a waste of time, believing that education should only focus on job skills and nothing else — an attitude which clearly overlooks the fact that critical thinking is an important job skill for everyone from auto mechanics to cognitive scientists.

a. Creativity

b. Skepticism

d. These are all dimensions of critical thinking

a. They are opposites

b. They are synonyms

c. They are in tension, but not incompatible

d. None of the above

a. The Enlightenment

b. The Renaissance

c. The current era

d. All of the above

a. Being constantly skeptical

b. Not being skeptical

c. Having a balance between too much skepticism and too little

d. No relation to skepticism

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• Search Search …

Philosophy Behind Critical Thinking: A Concise Overview

The philosophy behind critical thinking delves into the deeper understanding of what it means to think critically and to develop the ability to reason, analyze, and evaluate information in a structured and systematic manner. Critical thinking has intricate connections with philosophy, mainly because it originated from ancient philosophical teachings. At its core, the concept of critical thinking is rooted in the Socratic method of questioning, which emphasizes the importance of inquiry and rational thinking as a means to achieve knowledge.

Understanding critical thinking necessitates exploring the various philosophical groundings, which delves into epistemology, the branch of philosophy that deals with knowledge, truth, and belief. Epistemological theories help elucidate different approaches to critical thinking, such as the psychological approach, focusing on cognitive processes, and the cultural and social context approach, emphasizing the importance of context in shaping critical thought. In the realm of education, the role of critical thinking cannot be understated, as it is a vital component of teaching and learning, shaping the way individuals process and interpret information and develop intellectually.

Key Takeaways

• Critical thinking is deeply rooted in ancient philosophical teachings, particularly the Socratic method of questioning.
• Different philosophical groundings provide varying approaches to critical thinking, such as psychological and cultural/social context approaches.
• The importance of critical thinking in education is paramount, as it shapes how individuals process, interpret, and develop intellectually.

Understanding Critical Thinking

Definition and Process

Critical thinking is the ability to think clearly and rationally about what to do or what to believe. It involves engaging in reflective and independent thinking . To understand the logical connections between ideas, one needs to identify, construct, and evaluate arguments.

Logic, Reason, Rationality

Logic, reason, and rationality are essential components of critical thinking. Logic refers to the systematic approach to reasoning and validating claims through principles and rules. Reasoning, on the other hand, is the process of drawing conclusions based on logic, evidence, and assumptions. Rationality encompasses the use of logic and reason to make well-informed decisions, judgments, and evaluations.

Strategies and Patterns

To develop critical thinking skills, individuals must employ various strategies and recognize patterns in their thinking. Some common strategies include:

• Analysis : Breaking down complex problems, data, or texts into simpler parts to understand what they mean and explain the implications to others.
• Interpretation : Making sense of information and grasping its relevance in a given context.
• Inference : Drawing reasonable conclusions based on available evidence and logic.
• Evaluation : Assessing the credibility and validity of claims, arguments, or sources of information.

Recognizing patterns in thinking involves identifying common errors, biases, and other factors that might hinder critical thinking and refining one’s thought process accordingly.

Justification and Argumentation

Justification and argumentation play a crucial role in critical thinking. Justification refers to providing reasons or evidence in support of a claim, while argumentation involves constructing and evaluating arguments . Both justification and argumentation require logical reasoning, analysis of evidence, and clear communication of ideas.

Clarity and Reflection

Clarity is essential for effective critical thinking. This entails expressing ideas and arguments in a clear, concise, and organized manner. Furthermore, critical thinkers must also engage in reflection — the process of examining their own thought processes, assumptions, and biases. Reflecting on one’s beliefs and values helps individuals refine their thinking and develop a more nuanced understanding of the world around them.

In conclusion, understanding critical thinking involves exploring its definition, process, and key components, such as logic, reason, rationality, strategies, patterns, justification, argumentation, clarity, and reflection. By cultivating a strong foundation in these areas, individuals can develop their ability to think critically and make well-informed decisions in various aspects of life.

Psychological Approach to Critical Thinking

Cognition and Pattern Recognition

The psychological approach to critical thinking emphasizes the role of cognition and pattern recognition in the process. Cognitive psychologists recognize that our minds have a natural ability to identify patterns and relationships in the information we encounter. This involves categorizing, comparing, and evaluating various pieces of information. By developing cognitive skills, individuals can more effectively analyze and evaluate complex arguments, ultimately fostering their critical thinking abilities.

Bias and Judgments

Another aspect of the psychological approach to critical thinking is the examination of biases and judgments. Bias refers to the systematic errors or distortions in human reasoning that can arise from emotions, beliefs, or external factors. When individuals possess a strong bias, it can impede their ability to think critically and accurately evaluate information. By being aware of these biases and actively seeking to minimize their influence, one can improve their critical thinking skills and make more accurate judgments.

Problem-Solving and Decision-Making

Finally, the psychological approach to critical thinking also emphasizes the importance of problem-solving and decision-making abilities. Effective problem-solving is accomplished by identifying the problem, gathering and evaluating relevant information, and formulating potential solutions. Strong decision-making skills involve comparing potential solutions and selecting the most effective one based on logical reasoning and evidence.

In conclusion, the psychological approach to critical thinking focuses on fostering cognitive skills, identifying and minimizing biases, and developing strong problem-solving and decision-making abilities. By enhancing these aspects, individuals can become more effective critical thinkers and make well-informed decisions throughout their lives.

Philosophical Groundings

Roots of critical thought.

The roots of critical thought can be traced back to ancient Greek philosophy, particularly the ideas developed by Socrates, Plato, and Aristotle. In their teachings, these philosophers emphasized the importance of questioning and examining beliefs, seeking evidence, and evaluating arguments logically. Through these pursuits, they laid a strong foundation for the development of critical thinking in modern times.

Major Philosophers and Approaches

Several major philosophers and their approaches have significantly contributed to the evolution of critical thinking. Among them, Socrates’ method of inquiry, known as the Socratic Method, involves continuous questioning and probing for deeper understanding. Plato, a student of Socrates, focused on the power of dialectical reasoning, urging individuals to engage in dialogue and debate to examine their own beliefs and the beliefs of others.

Aristotle contributed to critical thinking by emphasizing the importance of logic and coherent reasoning to gain knowledge. He also explored rhetoric, expounding on its role in persuasive argumentation. In more recent times, figures such as John Dewey and Karl Marx have provided insights into the role of critical thinking in education and social transformation.

Informal Logic and its Importance

Informal logic plays a crucial role in critical thinking as it concerns the principles and methods used to analyze everyday arguments and reasoning beyond the scope of formal logic. It complements formal logic, which deals strictly with logical systems and symbols. Informal logic helps individuals assess the validity, soundness, and context of arguments encountered in daily life. By honing their skills in informal logic, individuals can become better critical thinkers and more adept at navigating complex situations and decision-making processes.

Through the teachings of philosophers like Plato, Aristotle, and Socrates, as well as the application of informal logic and logical reasoning, the concept of critical thinking has evolved into an essential aspect of learning and decision-making in modern society. Embracing these foundational elements can empower individuals to develop the skills necessary to think critically and effectively in various aspects of life.

Critical Thinking in Cultural and Social Context

Race and gender perspectives.

Critical thinking is a universal skill that transcends cultural and social boundaries. However, it is essential to consider the impact of race and gender on the development and exercise of critical thinking skills. People from marginalized groups may experience unique challenges and perspectives that influence their critical thinking abilities. For example, in a cross-cultural study examining critical thinking among nurse scholars in Thailand and the United States, distinctive perspectives on critical thinking were observed due to cultural differences. Understanding the intersections of race, gender, and critical thinking can help create more inclusive education and workplace environments that foster critical thinking for everyone.

Critical Thinking in a Democratic Society

In a democratic society, critical thinking plays a crucial role in informed decision-making, civic engagement, and open discussion. The healthy functioning of a democracy relies on the citizens’ capacity to discern reliable information, assess arguments, and make rational choices. According to the Stanford Encyclopedia of Philosophy , critical thinking includes abilities and dispositions that lead individuals to think critically when appropriate. Developing these skills allows members of democratic societies to engage in productive debates, evaluate policies, and hold leaders accountable.

Culture, Society, and Critical Thinking

Cultural backgrounds and societal norms can significantly impact how individuals approach critical thinking. Different cultures may emphasize various ways of thinking, problem-solving, and expressing ideas. As a result, critical thinking can manifest differently across cultures, often influenced by aspects such as language, traditions, and values. A study discussing critical thinking in its historical and social contexts highlights the importance of considering cultural influences when evaluating and teaching critical thinking.

In summary, critical thinking is an essential skill across various cultural, racial, gender, and social contexts. By acknowledging these differences and understanding the significance of critical thinking in democratic societies, educators and societies can promote a more inclusive environment for cultivating critical thinking skills.

Role of Critical Thinking in Education

Aims of education.

The primary aim of education is to foster the development of individuals’ cognitive capabilities, empowering them to grow into confident, knowledgeable and discerning adults. Critical thinking plays a significant role in education as it helps students acquire and apply knowledge more effectively, by analyzing, evaluating, and synthesizing information from diverse sources in a systematic manner, leading to more accurate and informed decisions.

In addition, critical thinking allows students to question existing knowledge and challenge conventional wisdom, thus avoiding indoctrination and promoting intellectual independence. This helps in nurturing open-minded and critical citizens who can contribute positively to society.

Skills Development

Critical thinking involves a variety of skills and abilities that are essential for students’ personal and professional success. These include problem-solving, decision making, logical reasoning, and effective communication, among others. By teaching these skills in the classroom, educators enable learners to confront complex issues and dilemmas with confidence and clarity, fostering their cognitive, social, and emotional growth.

Classroom activities focused on critical thinking are essential to help students develop a systematic approach to problem-solving and sharpen their analytical skills. Practical tasks, like debates, group discussions, case studies, or role plays, can be employed to engage students in active learning, thus enhancing their critical thought processes.

Standardized Tests vs. Critical Thought

While standardized tests have dominated the contemporary education system, there is growing concern regarding their effectiveness in promoting critical thinking. Some argue that standardized tests prioritize the acquisition of specific knowledge over the development of essential skills and abilities, leading to an education that is more focused on rote memorization than meaningful learning.

However, introducing critical thinking elements in the curriculum or classroom activities does not require a complete removal of standardized tests. Educators can strike a balance between knowledge acquisition and skill development by incorporating critical thinking exercises in conjunction with traditional assessments. In doing so, students can better prepare for life beyond the classroom, developing a mindset that values continuous learning, reflection, and intellectual curiosity.

Importance of Open-Mindedness and Skepticism

Being skeptical vs. being cynical.

It is essential to understand the difference between being skeptical and being cynical. Skepticism in critical thinking involves questioning assertions and assumptions, seeking evidence, and evaluating arguments from a neutral, objective viewpoint. On the other hand, cynicism is a distrustful attitude, where one assumes negative intentions or outcomes.

A critical thinker should strive to be skeptical rather than cynical. Approaching situations with skepticism allows for the exploration of different viewpoints and the willingness to change one’s mind based on new evidence, while cynicism can lead to the dismissal of valid arguments due to preconceived negative beliefs.

Traits of an Open-Minded Thinker

Open-mindedness is an essential trait for critical thinkers. Some key characteristics of an open-minded thinker include:

• Cognitive flexibility : Adapting to and considering new information or perspectives.
• Tolerance for ambiguity : Accepting the possibility that there may be multiple valid solutions or interpretations.
• Willingness to change : Being open to revising beliefs and opinions when presented with strong evidence or arguments.

Being open-minded allows critical thinkers to explore various perspectives and ideas and to evaluate them fairly. This inclination towards cognitive flexibility helps in avoiding rigidity in thinking, enabling better decision-making and problem-solving.

Role of Curiosity and Empathy in Critical Thinking

Curiosity and empathy play crucial roles in effective critical thinking. A curious individual seeks knowledge and understanding, thus asking relevant questions and engaging in Socratic questioning. Socratic questioning is a method of probing and analyzing through questions to encourage self-reflection and deeper understanding. This technique fosters critical thinking by challenging assumptions and providing opportunities to explore diverse viewpoints.

Empathy, on the other hand, permits critical thinkers to comprehend and appreciate different perspectives by placing themselves in others’ shoes. An empathetic approach contributes to open-mindedness and cultivates a sense of humility, recognizing that individuals may hold contrasting opinions based on personal experiences or beliefs. The combination of curiosity and empathy enhances critical thinking by promoting a more inclusive and nuanced understanding of complex issues and scenarios.

In the realm of philosophy, critical thinking holds a prominent position. It is a process that revolves around using and assessing reasons to evaluate statements, assumptions, and arguments in ordinary situations. The ultimate goal of critical thinking is to foster good beliefs, aligning them with goals such as truth, usefulness, and rationality 1 .

John Dewey played a crucial role in shaping the concept of critical thinking by introducing it as an educational goal 2 . He connected it with a scientific attitude of mind, highlighting the importance of reflective thought in the process of critical thinking. This approach enhances one’s ability to understand and analyze situations, leading to informed and rational decisions.

Critical thinking equips individuals with the tools necessary to think carefully with clarity, depth, precision, accuracy, and logic 3 . It has applications across various domains, such as science, where great scientists like Albert Einstein have benefited from critical thinking skills to discover groundbreaking concepts.

In conclusion, the philosophy behind critical thinking emphasizes the importance of cultivating a rational and reflective mindset. As an essential skill for problem-solving and decision-making, critical thinking plays a vital role in developing well-rounded individuals ready to navigate the complexities of the world.

• Internet Encyclopedia of Philosophy ↩
• Stanford Encyclopedia of Philosophy ↩
• SlideShare ↩

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Critical Thinking

Critical thinking is a widely accepted educational goal. Its definition is contested, but the competing definitions can be understood as differing conceptions of the same basic concept: careful thinking directed to a goal. Conceptions differ with respect to the scope of such thinking, the type of goal, the criteria and norms for thinking carefully, and the thinking components on which they focus. Its adoption as an educational goal has been recommended on the basis of respect for students’ autonomy and preparing students for success in life and for democratic citizenship. “Critical thinkers” have the dispositions and abilities that lead them to think critically when appropriate. The abilities can be identified directly; the dispositions indirectly, by considering what factors contribute to or impede exercise of the abilities. Standardized tests have been developed to assess the degree to which a person possesses such dispositions and abilities. Educational intervention has been shown experimentally to improve them, particularly when it includes dialogue, anchored instruction, and mentoring. Controversies have arisen over the generalizability of critical thinking across domains, over alleged bias in critical thinking theories and instruction, and over the relationship of critical thinking to other types of thinking.

2.1 Dewey’s Three Main Examples

2.2 dewey’s other examples, 2.3 further examples, 2.4 non-examples, 3. the definition of critical thinking, 4. its value, 5. the process of thinking critically, 6. components of the process, 7. contributory dispositions and abilities, 8.1 initiating dispositions, 8.2 internal dispositions, 9. critical thinking abilities, 10. required knowledge, 11. educational methods, 12.1 the generalizability of critical thinking, 12.2 bias in critical thinking theory and pedagogy, 12.3 relationship of critical thinking to other types of thinking, other internet resources, related entries.

Use of the term ‘critical thinking’ to describe an educational goal goes back to the American philosopher John Dewey (1910), who more commonly called it ‘reflective thinking’. He defined it as

active, persistent and careful consideration of any belief or supposed form of knowledge in the light of the grounds that support it, and the further conclusions to which it tends. (Dewey 1910: 6; 1933: 9)

and identified a habit of such consideration with a scientific attitude of mind. His lengthy quotations of Francis Bacon, John Locke, and John Stuart Mill indicate that he was not the first person to propose development of a scientific attitude of mind as an educational goal.

In the 1930s, many of the schools that participated in the Eight-Year Study of the Progressive Education Association (Aikin 1942) adopted critical thinking as an educational goal, for whose achievement the study’s Evaluation Staff developed tests (Smith, Tyler, & Evaluation Staff 1942). Glaser (1941) showed experimentally that it was possible to improve the critical thinking of high school students. Bloom’s influential taxonomy of cognitive educational objectives (Bloom et al. 1956) incorporated critical thinking abilities. Ennis (1962) proposed 12 aspects of critical thinking as a basis for research on the teaching and evaluation of critical thinking ability.

Since 1980, an annual international conference in California on critical thinking and educational reform has attracted tens of thousands of educators from all levels of education and from many parts of the world. Also since 1980, the state university system in California has required all undergraduate students to take a critical thinking course. Since 1983, the Association for Informal Logic and Critical Thinking has sponsored sessions in conjunction with the divisional meetings of the American Philosophical Association (APA). In 1987, the APA’s Committee on Pre-College Philosophy commissioned a consensus statement on critical thinking for purposes of educational assessment and instruction (Facione 1990a). Researchers have developed standardized tests of critical thinking abilities and dispositions; for details, see the Supplement on Assessment . Educational jurisdictions around the world now include critical thinking in guidelines for curriculum and assessment. Political and business leaders endorse its importance.

For details on this history, see the Supplement on History .

2. Examples and Non-Examples

Before considering the definition of critical thinking, it will be helpful to have in mind some examples of critical thinking, as well as some examples of kinds of thinking that would apparently not count as critical thinking.

Dewey (1910: 68–71; 1933: 91–94) takes as paradigms of reflective thinking three class papers of students in which they describe their thinking. The examples range from the everyday to the scientific.

Transit : “The other day, when I was down town on 16th Street, a clock caught my eye. I saw that the hands pointed to 12:20. This suggested that I had an engagement at 124th Street, at one o'clock. I reasoned that as it had taken me an hour to come down on a surface car, I should probably be twenty minutes late if I returned the same way. I might save twenty minutes by a subway express. But was there a station near? If not, I might lose more than twenty minutes in looking for one. Then I thought of the elevated, and I saw there was such a line within two blocks. But where was the station? If it were several blocks above or below the street I was on, I should lose time instead of gaining it. My mind went back to the subway express as quicker than the elevated; furthermore, I remembered that it went nearer than the elevated to the part of 124th Street I wished to reach, so that time would be saved at the end of the journey. I concluded in favor of the subway, and reached my destination by one o’clock.” (Dewey 1910: 68-69; 1933: 91-92)

Ferryboat : “Projecting nearly horizontally from the upper deck of the ferryboat on which I daily cross the river is a long white pole, having a gilded ball at its tip. It suggested a flagpole when I first saw it; its color, shape, and gilded ball agreed with this idea, and these reasons seemed to justify me in this belief. But soon difficulties presented themselves. The pole was nearly horizontal, an unusual position for a flagpole; in the next place, there was no pulley, ring, or cord by which to attach a flag; finally, there were elsewhere on the boat two vertical staffs from which flags were occasionally flown. It seemed probable that the pole was not there for flag-flying.

“I then tried to imagine all possible purposes of the pole, and to consider for which of these it was best suited: (a) Possibly it was an ornament. But as all the ferryboats and even the tugboats carried poles, this hypothesis was rejected. (b) Possibly it was the terminal of a wireless telegraph. But the same considerations made this improbable. Besides, the more natural place for such a terminal would be the highest part of the boat, on top of the pilot house. (c) Its purpose might be to point out the direction in which the boat is moving.

“In support of this conclusion, I discovered that the pole was lower than the pilot house, so that the steersman could easily see it. Moreover, the tip was enough higher than the base, so that, from the pilot's position, it must appear to project far out in front of the boat. Morevoer, the pilot being near the front of the boat, he would need some such guide as to its direction. Tugboats would also need poles for such a purpose. This hypothesis was so much more probable than the others that I accepted it. I formed the conclusion that the pole was set up for the purpose of showing the pilot the direction in which the boat pointed, to enable him to steer correctly.” (Dewey 1910: 69-70; 1933: 92-93)

Bubbles : “In washing tumblers in hot soapsuds and placing them mouth downward on a plate, bubbles appeared on the outside of the mouth of the tumblers and then went inside. Why? The presence of bubbles suggests air, which I note must come from inside the tumbler. I see that the soapy water on the plate prevents escape of the air save as it may be caught in bubbles. But why should air leave the tumbler? There was no substance entering to force it out. It must have expanded. It expands by increase of heat, or by decrease of pressure, or both. Could the air have become heated after the tumbler was taken from the hot suds? Clearly not the air that was already entangled in the water. If heated air was the cause, cold air must have entered in transferring the tumblers from the suds to the plate. I test to see if this supposition is true by taking several more tumblers out. Some I shake so as to make sure of entrapping cold air in them. Some I take out holding mouth downward in order to prevent cold air from entering. Bubbles appear on the outside of every one of the former and on none of the latter. I must be right in my inference. Air from the outside must have been expanded by the heat of the tumbler, which explains the appearance of the bubbles on the outside. But why do they then go inside? Cold contracts. The tumbler cooled and also the air inside it. Tension was removed, and hence bubbles appeared inside. To be sure of this, I test by placing a cup of ice on the tumbler while the bubbles are still forming outside. They soon reverse” (Dewey 1910: 70–71; 1933: 93–94).

Dewey (1910, 1933) sprinkles his book with other examples of critical thinking. We will refer to the following.

Weather : A man on a walk notices that it has suddenly become cool, thinks that it is probably going to rain, looks up and sees a dark cloud obscuring the sun, and quickens his steps (1910: 6–10; 1933: 9–13).

Disorder : A man finds his rooms on his return to them in disorder with his belongings thrown about, thinks at first of burglary as an explanation, then thinks of mischievous children as being an alternative explanation, then looks to see whether valuables are missing, and discovers that they are (1910: 82–83; 1933: 166–168).

Typhoid : A physician diagnosing a patient whose conspicuous symptoms suggest typhoid avoids drawing a conclusion until more data are gathered by questioning the patient and by making tests (1910: 85–86; 1933: 170).

Blur : A moving blur catches our eye in the distance, we ask ourselves whether it is a cloud of whirling dust or a tree moving its branches or a man signaling to us, we think of other traits that should be found on each of those possibilities, and we look and see if those traits are found (1910: 102, 108; 1933: 121, 133).

Suction pump : In thinking about the suction pump, the scientist first notes that it will draw water only to a maximum height of 33 feet at sea level and to a lesser maximum height at higher elevations, selects for attention the differing atmospheric pressure at these elevations, sets up experiments in which the air is removed from a vessel containing water (when suction no longer works) and in which the weight of air at various levels is calculated, compares the results of reasoning about the height to which a given weight of air will allow a suction pump to raise water with the observed maximum height at different elevations, and finally assimilates the suction pump to such apparently different phenomena as the siphon and the rising of a balloon (1910: 150–153; 1933: 195–198).

Diamond : A passenger in a car driving in a diamond lane reserved for vehicles with at least one passenger notices that the diamond marks on the pavement are far apart in some places and close together in others. Why? The driver suggests that the reason may be that the diamond marks are not needed where there is a solid double line separating the diamond line from the adjoining lane, but are needed when there is a dotted single line permitting crossing into the diamond lane. Further observation confirms that the diamonds are close together when a dotted line separates the diamond lane from its neighbour, but otherwise far apart.

Rash : A woman suddenly develops a very itchy red rash on her throat and upper chest. She recently noticed a mark on the back of her right hand, but was not sure whether the mark was a rash or a scrape. She lies down in bed and thinks about what might be causing the rash and what to do about it. About two weeks before, she began taking blood pressure medication that contained a sulfa drug, and the pharmacist had warned her, in view of a previous allergic reaction to a medication containing a sulfa drug, to be on the alert for an allergic reaction; however, she had been taking the medication for two weeks with no such effect. The day before, she began using a new cream on her neck and upper chest; against the new cream as the cause was mark on the back of her hand, which had not been exposed to the cream. She began taking probiotics about a month before. She also recently started new eye drops, but she supposed that manufacturers of eye drops would be careful not to include allergy-causing components in the medication. The rash might be a heat rash, since she recently was sweating profusely from her upper body. Since she is about to go away on a short vacation, where she would not have access to her usual physician, she decides to keep taking the probiotics and using the new eye drops but to discontinue the blood pressure medication and to switch back to the old cream for her neck and upper chest. She forms a plan to consult her regular physician on her return about the blood pressure medication.

Candidate : Although Dewey included no examples of thinking directed at appraising the arguments of others, such thinking has come to be considered a kind of critical thinking. We find an example of such thinking in the performance task on the Collegiate Learning Assessment (CLA+), which its sponsoring organization describes as

a performance-based assessment that provides a measure of an institution’s contribution to the development of critical-thinking and written communication skills of its students. (Council for Aid to Education 2017)

A sample task posted on its website requires the test-taker to write a report for public distribution evaluating a fictional candidate’s policy proposals and their supporting arguments, using supplied background documents, with a recommendation on whether to endorse the candidate.

Immediate acceptance of an idea that suggests itself as a solution to a problem (e.g., a possible explanation of an event or phenomenon, an action that seems likely to produce a desired result) is “uncritical thinking, the minimum of reflection” (Dewey 1910: 13). On-going suspension of judgment in the light of doubt about a possible solution is not critical thinking (Dewey 1910: 108). Critique driven by a dogmatically held political or religious ideology is not critical thinking; thus Paulo Freire (1968 [1970]) is using the term (e.g., at 1970: 71, 81, 100, 146) in a more politically freighted sense that includes not only reflection but also revolutionary action against oppression. Derivation of a conclusion from given data using an algorithm is not critical thinking.

What is critical thinking? There are many definitions. Ennis (2016) lists 14 philosophically oriented scholarly definitions and three dictionary definitions. Following Rawls (1971), who distinguished his conception of justice from a utilitarian conception but regarded them as rival conceptions of the same concept, Ennis maintains that the 17 definitions are different conceptions of the same concept. Rawls articulated the shared concept of justice as

a characteristic set of principles for assigning basic rights and duties and for determining… the proper distribution of the benefits and burdens of social cooperation. (Rawls 1971: 5)

Bailin et al. (1999b) claim that, if one considers what sorts of thinking an educator would take not to be critical thinking and what sorts to be critical thinking, one can conclude that educators typically understand critical thinking to have at least three features.

• It is done for the purpose of making up one’s mind about what to believe or do.
• The person engaging in the thinking is trying to fulfill standards of adequacy and accuracy appropriate to the thinking.
• The thinking fulfills the relevant standards to some threshold level.

One could sum up the core concept that involves these three features by saying that critical thinking is careful goal-directed thinking. This core concept seems to apply to all the examples of critical thinking described in the previous section. As for the non-examples, their exclusion depends on construing careful thinking as excluding jumping immediately to conclusions, suspending judgment no matter how strong the evidence, reasoning from an unquestioned ideological or religious perspective, and routinely using an algorithm to answer a question.

If the core of critical thinking is careful goal-directed thinking, conceptions of it can vary according to its presumed scope, its presumed goal, one’s criteria and threshold for being careful, and the thinking component on which one focuses As to its scope, some conceptions (e.g., Dewey 1910, 1933) restrict it to constructive thinking on the basis of one’s own observations and experiments, others (e.g., Ennis 1962; Fisher & Scriven 1997; Johnson 1992) to appraisal of the products of such thinking. Ennis (1991) and Bailin et al. (1999b) take it to cover both construction and appraisal. As to its goal, some conceptions restrict it to forming a judgment (Dewey 1910, 1933; Lipman 1987; Facione 1990a). Others allow for actions as well as beliefs as the end point of a process of critical thinking (Ennis 1991; Bailin et al. 1999b). As to the criteria and threshold for being careful, definitions vary in the term used to indicate that critical thinking satisfies certain norms: “intellectually disciplined” (Scriven & Paul 1987), “reasonable” (Ennis 1991), “skillful” (Lipman 1987), “skilled” (Fisher & Scriven 1997), “careful” (Bailin & Battersby 2009). Some definitions specify these norms, referring variously to “consideration of any belief or supposed form of knowledge in the light of the grounds that support it and the further conclusions to which it tends” (Dewey 1910, 1933); “the methods of logical inquiry and reasoning” (Glaser 1941); “conceptualizing, applying, analyzing, synthesizing, and/or evaluating information gathered from, or generated by, observation, experience, reflection, reasoning, or communication” (Scriven & Paul 1987); the requirement that “it is sensitive to context, relies on criteria, and is self-correcting” (Lipman 1987); “evidential, conceptual, methodological, criteriological, or contextual considerations” (Facione 1990a); and “plus-minus considerations of the product in terms of appropriate standards (or criteria)” (Johnson 1992). Stanovich and Stanovich (2010) propose to ground the concept of critical thinking in the concept of rationality, which they understand as combining epistemic rationality (fitting one’s beliefs to the world) and instrumental rationality (optimizing goal fulfillment); a critical thinker, in their view, is someone with “a propensity to override suboptimal responses from the autonomous mind” (2010: 227). These variant specifications of norms for critical thinking are not necessarily incompatible with one another, and in any case presuppose the core notion of thinking carefully. As to the thinking component singled out, some definitions focus on suspension of judgment during the thinking (Dewey 1910; McPeck 1981), others on inquiry while judgment is suspended (Bailin & Battersby 2009), others on the resulting judgment (Facione 1990a), and still others on the subsequent emotive response (Siegel 1988).

In educational contexts, a definition of critical thinking is a “programmatic definition” (Scheffler 1960: 19). It expresses a practical program for achieving an educational goal. For this purpose, a one-sentence formulaic definition is much less useful than articulation of a critical thinking process, with criteria and standards for the kinds of thinking that the process may involve. The real educational goal is recognition, adoption and implementation by students of those criteria and standards. That adoption and implementation in turn consists in acquiring the knowledge, abilities and dispositions of a critical thinker.

Conceptions of critical thinking generally do not include moral integrity as part of the concept. Dewey, for example, took critical thinking to be the ultimate intellectual goal of education, but distinguished it from the development of social cooperation among school children, which he took to be the central moral goal. Ennis (1996, 2011) added to his previous list of critical thinking dispositions a group of dispositions to care about the dignity and worth of every person, which he described as a “correlative” (1996) disposition without which critical thinking would be less valuable and perhaps harmful. An educational program that aimed at developing critical thinking but not the correlative disposition to care about the dignity and worth of every person, he asserted, “would be deficient and perhaps dangerous” (Ennis 1996: 172).

Dewey thought that education for reflective thinking would be of value to both the individual and society; recognition in educational practice of the kinship to the scientific attitude of children’s native curiosity, fertile imagination and love of experimental inquiry “would make for individual happiness and the reduction of social waste” (Dewey 1910: iii). Schools participating in the Eight-Year Study took development of the habit of reflective thinking and skill in solving problems as a means to leading young people to understand, appreciate and live the democratic way of life characteristic of the United States (Aikin 1942: 17–18, 81). Harvey Siegel (1988: 55–61) has offered four considerations in support of adopting critical thinking as an educational ideal. (1) Respect for persons requires that schools and teachers honour students’ demands for reasons and explanations, deal with students honestly, and recognize the need to confront students’ independent judgment; these requirements concern the manner in which teachers treat students. (2) Education has the task of preparing children to be successful adults, a task that requires development of their self-sufficiency. (3) Education should initiate children into the rational traditions in such fields as history, science and mathematics. (4) Education should prepare children to become democratic citizens, which requires reasoned procedures and critical talents and attitudes. To supplement these considerations, Siegel (1988: 62–90) responds to two objections: the ideology objection that adoption of any educational ideal requires a prior ideological commitment and the indoctrination objection that cultivation of critical thinking cannot escape being a form of indoctrination.

Despite the diversity of our 11 examples, one can recognize a common pattern. Dewey analyzed it as consisting of five phases:

• suggestions , in which the mind leaps forward to a possible solution;
• an intellectualization of the difficulty or perplexity into a problem to be solved, a question for which the answer must be sought;
• the use of one suggestion after another as a leading idea, or hypothesis , to initiate and guide observation and other operations in collection of factual material;
• the mental elaboration of the idea or supposition as an idea or supposition ( reasoning , in the sense on which reasoning is a part, not the whole, of inference); and
• testing the hypothesis by overt or imaginative action. (Dewey 1933: 106–107; italics in original)

The process of reflective thinking consisting of these phases would be preceded by a perplexed, troubled or confused situation and followed by a cleared-up, unified, resolved situation (Dewey 1933: 106). The term ‘phases’ replaced the term ‘steps’ (Dewey 1910: 72), thus removing the earlier suggestion of an invariant sequence. Variants of the above analysis appeared in (Dewey 1916: 177) and (Dewey 1938: 101–119).

The variant formulations indicate the difficulty of giving a single logical analysis of such a varied process. The process of critical thinking may have a spiral pattern, with the problem being redefined in the light of obstacles to solving it as originally formulated. For example, the person in Transit might have concluded that getting to the appointment at the scheduled time was impossible and have reformulated the problem as that of rescheduling the appointment for a mutually convenient time. Further, defining a problem does not always follow after or lead immediately to an idea of a suggested solution. Nor should it do so, as Dewey himself recognized in describing the physician in Typhoid as avoiding any strong preference for this or that conclusion before getting further information (Dewey 1910: 85; 1933: 170). People with a hypothesis in mind, even one to which they have a very weak commitment, have a so-called “confirmation bias” (Nickerson 1998): they are likely to pay attention to evidence that confirms the hypothesis and to ignore evidence that counts against it or for some competing hypothesis. Detectives, intelligence agencies, and investigators of airplane accidents are well advised to gather relevant evidence systematically and to postpone even tentative adoption of an explanatory hypothesis until the collected evidence rules out with the appropriate degree of certainty all but one explanation. Dewey’s analysis of the critical thinking process can be faulted as well for requiring acceptance or rejection of a possible solution to a defined problem, with no allowance for deciding in the light of the available evidence to suspend judgment. Further, given the great variety of kinds of problems for which reflection is appropriate, there is likely to be variation in its component events. Perhaps the best way to conceptualize the critical thinking process is as a checklist whose component events can occur in a variety of orders, selectively, and more than once. These component events might include (1) noticing a difficulty, (2) defining the problem, (3) dividing the problem into manageable sub-problems, (4) formulating a variety of possible solutions to the problem or sub-problem, (5) determining what evidence is relevant to deciding among possible solutions to the problem or sub-problem, (6) devising a plan of systematic observation or experiment that will uncover the relevant evidence, (7) carrying out the plan of systematic observation or experimentation, (8) noting the results of the systematic observation or experiment, (9) gathering relevant testimony and information from others, (10) judging the credibility of testimony and information gathered from others, (11) drawing conclusions from gathered evidence and accepted testimony, and (12) accepting a solution that the evidence adequately supports (cf. Hitchcock 2017: 485).

Checklist conceptions of the process of critical thinking are open to the objection that they are too mechanical and procedural to fit the multi-dimensional and emotionally charged issues for which critical thinking is urgently needed (Paul 1984). For such issues, a more dialectical process is advocated, in which competing relevant world views are identified, their implications explored, and some sort of creative synthesis attempted.

If one considers the critical thinking process illustrated by the 11 examples, one can identify distinct kinds of mental acts and mental states that form part of it. To distinguish, label and briefly characterize these components is a useful preliminary to identifying abilities, skills, dispositions, attitudes, habits and the like that contribute causally to thinking critically. Identifying such abilities and habits is in turn a useful preliminary to setting educational goals. Setting the goals is in its turn a useful preliminary to designing strategies for helping learners to achieve the goals and to designing ways of measuring the extent to which learners have done so. Such measures provide both feedback to learners on their achievement and a basis for experimental research on the effectiveness of various strategies for educating people to think critically. Let us begin, then, by distinguishing the kinds of mental acts and mental events that can occur in a critical thinking process.

• Observing : One notices something in one’s immediate environment (sudden cooling of temperature in Weather , bubbles forming outside a glass and then going inside in Bubbles , a moving blur in the distance in Blur , a rash in Rash ). Or one notes the results of an experiment or systematic observation (valuables missing in Disorder , no suction without air pressure in Suction pump )
• Feeling : One feels puzzled or uncertain about something (how to get to an appointment on time in Transit , why the diamonds vary in frequency in Diamond ). One wants to resolve this perplexity. One feels satisfaction once one has worked out an answer (to take the subway express in Transit , diamonds closer when needed as a warning in Diamond ).
• Wondering : One formulates a question to be addressed (why bubbles form outside a tumbler taken from hot water in Bubbles , how suction pumps work in Suction pump , what caused the rash in Rash ).
• Imagining : One thinks of possible answers (bus or subway or elevated in Transit , flagpole or ornament or wireless communication aid or direction indicator in Ferryboat , allergic reaction or heat rash in Rash ).
• Inferring : One works out what would be the case if a possible answer were assumed (valuables missing if there has been a burglary in Disorder , earlier start to the rash if it is an allergic reaction to a sulfa drug in Rash ). Or one draws a conclusion once sufficient relevant evidence is gathered (take the subway in Transit , burglary in Disorder , discontinue blood pressure medication and new cream in Rash ).
• Knowledge : One uses stored knowledge of the subject-matter to generate possible answers or to infer what would be expected on the assumption of a particular answer (knowledge of a city’s public transit system in Transit , of the requirements for a flagpole in Ferryboat , of Boyle’s law in Bubbles , of allergic reactions in Rash ).
• Experimenting : One designs and carries out an experiment or a systematic observation to find out whether the results deduced from a possible answer will occur (looking at the location of the flagpole in relation to the pilot’s position in Ferryboat , putting an ice cube on top of a tumbler taken from hot water in Bubbles , measuring the height to which a suction pump will draw water at different elevations in Suction pump , noticing the frequency of diamonds when movement to or from a diamond lane is allowed in Diamond ).
• Consulting : One finds a source of information, gets the information from the source, and makes a judgment on whether to accept it. None of our 11 examples include searching for sources of information. In this respect they are unrepresentative, since most people nowadays have almost instant access to information relevant to answering any question, including many of those illustrated by the examples. However, Candidate includes the activities of extracting information from sources and evaluating its credibility.
• Identifying and analyzing arguments : One notices an argument and works out its structure and content as a preliminary to evaluating its strength. This activity is central to Candidate . It is an important part of a critical thinking process in which one surveys arguments for various positions on an issue.
• Judging : One makes a judgment on the basis of accumulated evidence and reasoning, such as the judgment in Ferryboat that the purpose of the pole is to provide direction to the pilot.
• Deciding : One makes a decision on what to do or on what policy to adopt, as in the decision in Transit to take the subway.

By definition, a person who does something voluntarily is both willing and able to do that thing at that time. Both the willingness and the ability contribute causally to the person’s action, in the sense that the voluntary action would not occur if either (or both) of these were lacking. For example, suppose that one is standing with one’s arms at one’s sides and one voluntarily lifts one’s right arm to an extended horizontal position. One would not do so if one were unable to lift one’s arm, if for example one’s right side was paralyzed as the result of a stroke. Nor would one do so if one were unwilling to lift one’s arm, if for example one were participating in a street demonstration at which a white supremacist was urging the crowd to lift their right arm in a Nazi salute and one were unwilling to express support in this way for the racist Nazi ideology. The same analysis applies to a voluntary mental process of thinking critically. It requires both willingness and ability to think critically, including willingness and ability to perform each of the mental acts that compose the process and to coordinate those acts in a sequence that is directed at resolving the initiating perplexity.

Consider willingness first. We can identify causal contributors to willingness to think critically by considering factors that would cause a person who was able to think critically about an issue nevertheless not to do so (Hamby 2014). For each factor, the opposite condition thus contributes causally to willingness to think critically on a particular occasion. For example, people who habitually jump to conclusions without considering alternatives will not think critically about issues that arise, even if they have the required abilities. The contrary condition of willingness to suspend judgment is thus a causal contributor to thinking critically.

Now consider ability. In contrast to the ability to move one’s arm, which can be completely absent because a stroke has left the arm paralyzed, the ability to think critically is a developed ability, whose absence is not a complete absence of ability to think but absence of ability to think well. We can identify the ability to think well directly, in terms of the norms and standards for good thinking. In general, to be able do well the thinking activities that can be components of a critical thinking process, one needs to know the concepts and principles that characterize their good performance, to recognize in particular cases that the concepts and principles apply, and to apply them. The knowledge, recognition and application may be procedural rather than declarative. It may be domain-specific rather than widely applicable, and in either case may need subject-matter knowledge, sometimes of a deep kind.

Reflections of the sort illustrated by the previous two paragraphs have led scholars to identify the knowledge, abilities and dispositions of a “critical thinker”, i.e., someone who thinks critically whenever it is appropriate to do so. We turn now to these three types of causal contributors to thinking critically. We start with dispositions, since arguably these are the most powerful contributors to being a critical thinker, can be fostered at an early stage of a child’s development, and are susceptible to general improvement (Glaser 1941: 175)

8. Critical Thinking Dispositions

Educational researchers use the term ‘dispositions’ broadly for the habits of mind and attitudes that contribute causally to being a critical thinker. Some writers (e.g., Paul & Elder 2006; Hamby 2014; Bailin & Battersby 2016) propose to use the term ‘virtues’ for this dimension of a critical thinker. The virtues in question, although they are virtues of character, concern the person’s ways of thinking rather than the person’s ways of behaving towards others. They are not moral virtues but intellectual virtues, of the sort articulated by Zagzebski (1996) and discussed by Turri, Alfano, and Greco (2017).

On a realistic conception, thinking dispositions or intellectual virtues are real properties of thinkers. They are general tendencies, propensities, or inclinations to think in particular ways in particular circumstances, and can be genuinely explanatory (Siegel 1999). Sceptics argue that there is no evidence for a specific mental basis for the habits of mind that contribute to thinking critically, and that it is pedagogically misleading to posit such a basis (Bailin et al. 1999a). Whatever their status, critical thinking dispositions need motivation for their initial formation in a child—motivation that may be external or internal. As children develop, the force of habit will gradually become important in sustaining the disposition (Nieto & Valenzuela 2012). Mere force of habit, however, is unlikely to sustain critical thinking dispositions. Critical thinkers must value and enjoy using their knowledge and abilities to think things through for themselves. They must be committed to, and lovers of, inquiry.

A person may have a critical thinking disposition with respect to only some kinds of issues. For example, one could be open-minded about scientific issues but not about religious issues. Similarly, one could be confident in one’s ability to reason about the theological implications of the existence of evil in the world but not in one’s ability to reason about the best design for a guided ballistic missile.

Critical thinking dispositions can usefully be divided into initiating dispositions (those that contribute causally to starting to think critically about an issue) and internal dispositions (those that contribute causally to doing a good job of thinking critically once one has started) (Facione 1990a: 25). The two categories are not mutually exclusive. For example, open-mindedness, in the sense of willingness to consider alternative points of view to one’s own, is both an initiating and an internal disposition.

Using the strategy of considering factors that would block people with the ability to think critically from doing so, we can identify as initiating dispositions for thinking critically attentiveness, a habit of inquiry, self-confidence, courage, open-mindedness, willingness to suspend judgment, trust in reason, wanting evidence for one’s beliefs, and seeking the truth. We consider briefly what each of these dispositions amounts to, in each case citing sources that acknowledge them.

• Attentiveness : One will not think critically if one fails to recognize an issue that needs to be thought through. For example, the pedestrian in Weather would not have looked up if he had not noticed that the air was suddenly cooler. To be a critical thinker, then, one needs to be habitually attentive to one’s surroundings, noticing not only what one senses but also sources of perplexity in messages received and in one’s own beliefs and attitudes (Facione 1990a: 25; Facione, Facione, & Giancarlo 2001).
• Habit of inquiry : Inquiry is effortful, and one needs an internal push to engage in it. For example, the student in Bubbles could easily have stopped at idle wondering about the cause of the bubbles rather than reasoning to a hypothesis, then designing and executing an experiment to test it. Thus willingness to think critically needs mental energy and initiative. What can supply that energy? Love of inquiry, or perhaps just a habit of inquiry. Hamby (2015) has argued that willingness to inquire is the central critical thinking virtue, one that encompasses all the others. It is recognized as a critical thinking disposition by Dewey (1910: 29; 1933: 35), Glaser (1941: 5), Ennis (1987: 12; 1991: 8), Facione (1990a: 25), Bailin et al. (1999b: 294), Halpern (1998: 452), and Facione, Facione, & Giancarlo (2001).
• Self-confidence : Lack of confidence in one’s abilities can block critical thinking. For example, if the woman in Rash lacked confidence in her ability to figure things out for herself, she might just have assumed that the rash on her chest was the allergic reaction to her medication against which the pharmacist had warned her. Thus willingness to think critically requires confidence in one’s ability to inquire (Facione 1990a: 25; Facione, Facione, & Giancarlo 2001).
• Courage : Fear of thinking for oneself can stop one from doing it. Thus willingness to think critically requires intellectual courage (Paul & Elder 2006: 16).
• Open-mindedness : A dogmatic attitude will impede thinking critically. For example, a person who adheres rigidly to a “pro-choice” position on the issue of the legal status of induced abortion is likely to be unwilling to consider seriously the issue of when in its development an unborn child acquires a moral right to life. Thus willingness to think critically requires open-mindedness, in the sense of a willingness to examine questions to which one already accepts an answer but which further evidence or reasoning might cause one to answer differently (Dewey 1933; Facione 1990a; Ennis 1991; Bailin et al. 1999b; Halpern 1998, Facione, Facione, & Giancarlo 2001). Paul (1981) emphasizes open-mindedness about alternative world-views, and recommends a dialectical approach to integrating such views as central to what he calls “strong sense” critical thinking.
• Willingness to suspend judgment : Premature closure on an initial solution will block critical thinking. Thus willingness to think critically requires a willingness to suspend judgment while alternatives are explored (Facione 1990a; Ennis 1991; Halpern 1998).
• Trust in reason : Since distrust in the processes of reasoned inquiry will dissuade one from engaging in it, trust in them is an initiating critical thinking disposition (Facione 1990a, 25; Bailin et al. 1999b: 294; Facione, Facione, & Giancarlo 2001; Paul & Elder 2006). In reaction to an allegedly exclusive emphasis on reason in critical thinking theory and pedagogy, Thayer-Bacon (2000) argues that intuition, imagination, and emotion have important roles to play in an adequate conception of critical thinking that she calls “constructive thinking”. From her point of view, critical thinking requires trust not only in reason but also in intuition, imagination, and emotion.
• Seeking the truth : If one does not care about the truth but is content to stick with one’s initial bias on an issue, then one will not think critically about it. Seeking the truth is thus an initiating critical thinking disposition (Bailin et al. 1999b: 294; Facione, Facione, & Giancarlo 2001). A disposition to seek the truth is implicit in more specific critical thinking dispositions, such as trying to be well-informed, considering seriously points of view other than one’s own, looking for alternatives, suspending judgment when the evidence is insufficient, and adopting a position when the evidence supporting it is sufficient.

Some of the initiating dispositions, such as open-mindedness and willingness to suspend judgment, are also internal critical thinking dispositions, in the sense of mental habits or attitudes that contribute causally to doing a good job of critical thinking once one starts the process. But there are many other internal critical thinking dispositions. Some of them are parasitic on one’s conception of good thinking. For example, it is constitutive of good thinking about an issue to formulate the issue clearly and to maintain focus on it. For this purpose, one needs not only the corresponding ability but also the corresponding disposition. Ennis (1991: 8) describes it as the disposition “to determine and maintain focus on the conclusion or question”, Facione (1990a: 25) as “clarity in stating the question or concern”. Other internal dispositions are motivators to continue or adjust the critical thinking process, such as willingness to persist in a complex task and willingness to abandon nonproductive strategies in an attempt to self-correct (Halpern 1998: 452). For a list of identified internal critical thinking dispositions, see the Supplement on Internal Critical Thinking Dispositions .

Some theorists postulate skills, i.e., acquired abilities, as operative in critical thinking. It is not obvious, however, that a good mental act is the exercise of a generic acquired skill. Inferring an expected time of arrival, as in Transit , has some generic components but also uses non-generic subject-matter knowledge. Bailin et al. (1999a) argue against viewing critical thinking skills as generic and discrete, on the ground that skilled performance at a critical thinking task cannot be separated from knowledge of concepts and from domain-specific principles of good thinking. Talk of skills, they concede, is unproblematic if it means merely that a person with critical thinking skills is capable of intelligent performance.

Despite such scepticism, theorists of critical thinking have listed as general contributors to critical thinking what they variously call abilities (Glaser 1941; Ennis 1962, 1991), skills (Facione 1990a; Halpern 1998) or competencies (Fisher & Scriven 1997). Amalgamating these lists would produce a confusing and chaotic cornucopia of more than 50 possible educational objectives, with only partial overlap among them. It makes sense instead to try to understand the reasons for the multiplicity and diversity, and to make a selection according to one’s own reasons for singling out abilities to be developed in a critical thinking curriculum. Two reasons for diversity among lists of critical thinking abilities are the underlying conception of critical thinking and the envisaged educational level. Appraisal-only conceptions, for example, involve a different suite of abilities than constructive-only conceptions. Some lists, such as those in (Glaser 1941), are put forward as educational objectives for secondary school students, whereas others are proposed as objectives for college students (e.g., Facione 1990a).

The abilities described in the remaining paragraphs of this section emerge from reflection on the general abilities needed to do well the thinking activities identified in section 6 as components of the critical thinking process described in section 5 . The derivation of each collection of abilities is accompanied by citation of sources that list such abilities and of standardized tests that claim to test them.

Observational abilities : Careful and accurate observation sometimes requires specialist expertise and practice, as in the case of observing birds and observing accident scenes. However, there are general abilities of noticing what one’s senses are picking up from one’s environment and of being able to articulate clearly and accurately to oneself and others what one has observed. It helps in exercising them to be able to recognize and take into account factors that make one’s observation less trustworthy, such as prior framing of the situation, inadequate time, deficient senses, poor observation conditions, and the like. It helps as well to be skilled at taking steps to make one’s observation more trustworthy, such as moving closer to get a better look, measuring something three times and taking the average, and checking what one thinks one is observing with someone else who is in a good position to observe it. It also helps to be skilled at recognizing respects in which one’s report of one’s observation involves inference rather than direct observation, so that one can then consider whether the inference is justified. These abilities come into play as well when one thinks about whether and with what degree of confidence to accept an observation report, for example in the study of history or in a criminal investigation or in assessing news reports. Observational abilities show up in some lists of critical thinking abilities (Ennis 1962: 90; Facione 1990a: 16; Ennis 1991: 9). There are items testing a person’s ability to judge the credibility of observation reports in the Cornell Critical Thinking Tests, Levels X and Z (Ennis & Millman 1971; Ennis, Millman, & Tomko 1985, 2005). Norris and King (1983, 1985, 1990a, 1990b) is a test of ability to appraise observation reports.

Emotional abilities : The emotions that drive a critical thinking process are perplexity or puzzlement, a wish to resolve it, and satisfaction at achieving the desired resolution. Children experience these emotions at an early age, without being trained to do so. Education that takes critical thinking as a goal needs only to channel these emotions and to make sure not to stifle them. Collaborative critical thinking benefits from ability to recognize one’s own and others’ emotional commitments and reactions.

Questioning abilities : A critical thinking process needs transformation of an inchoate sense of perplexity into a clear question. Formulating a question well requires not building in questionable assumptions, not prejudging the issue, and using language that in context is unambiguous and precise enough (Ennis 1962: 97; 1991: 9).

Imaginative abilities : Thinking directed at finding the correct causal explanation of a general phenomenon or particular event requires an ability to imagine possible explanations. Thinking about what policy or plan of action to adopt requires generation of options and consideration of possible consequences of each option. Domain knowledge is required for such creative activity, but a general ability to imagine alternatives is helpful and can be nurtured so as to become easier, quicker, more extensive, and deeper (Dewey 1910: 34–39; 1933: 40–47). Facione (1990a) and Halpern (1998) include the ability to imagine alternatives as a critical thinking ability.

Inferential abilities : The ability to draw conclusions from given information, and to recognize with what degree of certainty one’s own or others’ conclusions follow, is universally recognized as a general critical thinking ability. All 11 examples in section 2 of this article include inferences, some from hypotheses or options (as in Transit , Ferryboat and Disorder ), others from something observed (as in Weather and Rash ). None of these inferences is formally valid. Rather, they are licensed by general, sometimes qualified substantive rules of inference (Toulmin 1958) that rest on domain knowledge—that a bus trip takes about the same time in each direction, that the terminal of a wireless telegraph would be located on the highest possible place, that sudden cooling is often followed by rain, that an allergic reaction to a sulfa drug generally shows up soon after one starts taking it. It is a matter of controversy to what extent the specialized ability to deduce conclusions from premisses using formal rules of inference is needed for critical thinking. Dewey (1933) locates logical forms in setting out the products of reflection rather than in the process of reflection. Ennis (1981a), on the other hand, maintains that a liberally-educated person should have the following abilities: to translate natural-language statements into statements using the standard logical operators, to use appropriately the language of necessary and sufficient conditions, to deal with argument forms and arguments containing symbols, to determine whether in virtue of an argument’s form its conclusion follows necessarily from its premisses, to reason with logically complex propositions, and to apply the rules and procedures of deductive logic. Inferential abilities are recognized as critical thinking abilities by Glaser (1941: 6), Facione (1990a: 9), Ennis (1991: 9), Fisher & Scriven (1997: 99, 111), and Halpern (1998: 452). Items testing inferential abilities constitute two of the five subtests of the Watson Glaser Critical Thinking Appraisal (Watson & Glaser 1980a, 1980b, 1994), two of the four sections in the Cornell Critical Thinking Test Level X (Ennis & Millman 1971; Ennis, Millman, & Tomko 1985, 2005), three of the seven sections in the Cornell Critical Thinking Test Level Z (Ennis & Millman 1971; Ennis, Millman, & Tomko 1985, 2005), 11 of the 34 items on Forms A and B of the California Critical Thinking Skills Test (Facione 1990b, 1992), and a high but variable proportion of the 25 selected-response questions in the Collegiate Learning Assessment (Council for Aid to Education 2017).

Experimenting abilities : Knowing how to design and execute an experiment is important not just in scientific research but also in everyday life, as in Rash . Dewey devoted a whole chapter of his How We Think (1910: 145–156; 1933: 190–202) to the superiority of experimentation over observation in advancing knowledge. Experimenting abilities come into play at one remove in appraising reports of scientific studies. Skill in designing and executing experiments includes the acknowledged abilities to appraise evidence (Glaser 1941: 6), to carry out experiments and to apply appropriate statistical inference techniques (Facione 1990a: 9), to judge inductions to an explanatory hypothesis (Ennis 1991: 9), and to recognize the need for an adequately large sample size (Halpern 1998). The Cornell Critical Thinking Test Level Z (Ennis & Millman 1971; Ennis, Millman, & Tomko 1985, 2005) includes four items (out of 52) on experimental design. The Collegiate Learning Assessment (Council for Aid to Education 2017) makes room for appraisal of study design in both its performance task and its selected-response questions.

Consulting abilities : Skill at consulting sources of information comes into play when one seeks information to help resolve a problem, as in Candidate . Ability to find and appraise information includes ability to gather and marshal pertinent information (Glaser 1941: 6), to judge whether a statement made by an alleged authority is acceptable (Ennis 1962: 84), to plan a search for desired information (Facione 1990a: 9), and to judge the credibility of a source (Ennis 1991: 9). Ability to judge the credibility of statements is tested by 24 items (out of 76) in the Cornell Critical Thinking Test Level X (Ennis & Millman 1971; Ennis, Millman, & Tomko 1985, 2005) and by four items (out of 52) in the Cornell Critical Thinking Test Level Z (Ennis & Millman 1971; Ennis, Millman, & Tomko 1985, 2005). The College Learning Assessment’s performance task requires evaluation of whether information in documents is credible or unreliable (Council for Aid to Education 2017).

Argument analysis abilities : The ability to identify and analyze arguments contributes to the process of surveying arguments on an issue in order to form one’s own reasoned judgment, as in Candidate . The ability to detect and analyze arguments is recognized as a critical thinking skill by Facione (1990a: 7–8), Ennis (1991: 9) and Halpern (1998). Five items (out of 34) on the California Critical Thinking Skills Test (Facione 1990b, 1992) test skill at argument analysis. The College Learning Assessment (Council for Aid to Education 2017) incorporates argument analysis in its selected-response tests of critical reading and evaluation and of critiquing an argument.

Judging skills and deciding skills : Skill at judging and deciding is skill at recognizing what judgment or decision the available evidence and argument supports, and with what degree of confidence. It is thus a component of the inferential skills already discussed.

Lists and tests of critical thinking abilities often include two more abilities: identifying assumptions and constructing and evaluating definitions.

In addition to dispositions and abilities, critical thinking needs knowledge: of critical thinking concepts, of critical thinking principles, and of the subject-matter of the thinking.

We can derive a short list of concepts whose understanding contributes to critical thinking from the critical thinking abilities described in the preceding section. Observational abilities require an understanding of the difference between observation and inference. Questioning abilities require an understanding of the concepts of ambiguity and vagueness. Inferential abilities require an understanding of the difference between conclusive and defeasible inference (traditionally, between deduction and induction), as well as of the difference between necessary and sufficient conditions. Experimenting abilities require an understanding of the concepts of hypothesis, null hypothesis, assumption and prediction, as well as of the concept of statistical significance and of its difference from importance. They also require an understanding of the difference between an experiment and an observational study, and in particular of the difference between a randomized controlled trial, a prospective correlational study and a retrospective (case-control) study. Argument analysis abilities require an understanding of the concepts of argument, premiss, assumption, conclusion and counter-consideration. Additional critical thinking concepts are proposed by Bailin et al. (1999b: 293), Fisher & Scriven (1997: 105–106), and Black (2012).

According to Glaser (1941: 25), ability to think critically requires knowledge of the methods of logical inquiry and reasoning. If we review the list of abilities in the preceding section, however, we can see that some of them can be acquired and exercised merely through practice, possibly guided in an educational setting, followed by feedback. Searching intelligently for a causal explanation of some phenomenon or event requires that one consider a full range of possible causal contributors, but it seems more important that one implements this principle in one’s practice than that one is able to articulate it. What is important is “operational knowledge” of the standards and principles of good thinking (Bailin et al. 1999b: 291–293). But the development of such critical thinking abilities as designing an experiment or constructing an operational definition can benefit from learning their underlying theory. Further, explicit knowledge of quirks of human thinking seems useful as a cautionary guide. Human memory is not just fallible about details, as people learn from their own experiences of misremembering, but is so malleable that a detailed, clear and vivid recollection of an event can be a total fabrication (Loftus 2017). People seek or interpret evidence in ways that are partial to their existing beliefs and expectations, often unconscious of their “confirmation bias” (Nickerson 1998). Not only are people subject to this and other cognitive biases (Kahneman 2011), of which they are typically unaware, but it may be counter-productive for one to make oneself aware of them and try consciously to counteract them or to counteract social biases such as racial or sexual stereotypes (Kenyon & Beaulac 2014). It is helpful to be aware of these facts and of the superior effectiveness of blocking the operation of biases—for example, by making an immediate record of one’s observations, refraining from forming a preliminary explanatory hypothesis, blind refereeing, double-blind randomized trials, and blind grading of students’ work.

Critical thinking about an issue requires substantive knowledge of the domain to which the issue belongs. Critical thinking abilities are not a magic elixir that can be applied to any issue whatever by somebody who has no knowledge of the facts relevant to exploring that issue. For example, the student in Bubbles needed to know that gases do not penetrate solid objects like a glass, that air expands when heated, that the volume of an enclosed gas varies directly with its temperature and inversely with its pressure, and that hot objects will spontaneously cool down to the ambient temperature of their surroundings unless kept hot by insulation or a source of heat. Critical thinkers thus need a rich fund of subject-matter knowledge relevant to the variety of situations they encounter. This fact is recognized in the inclusion among critical thinking dispositions of a concern to become and remain generally well informed.

Experimental educational interventions, with control groups, have shown that education can improve critical thinking skills and dispositions, as measured by standardized tests. For information about these tests, see the Supplement on Assessment .

What educational methods are most effective at developing the dispositions, abilities and knowledge of a critical thinker? Abrami et al. (2015) found that in the experimental and quasi-experimental studies that they analyzed dialogue, anchored instruction, and mentoring each increased the effectiveness of the educational intervention, and that they were most effective when combined. They also found that in these studies a combination of separate instruction in critical thinking with subject-matter instruction in which students are encouraged to think critically was more effective than either by itself. However, the difference was not statistically significant; that is, it might have arisen by chance.

Most of these studies lack the longitudinal follow-up required to determine whether the observed differential improvements in critical thinking abilities or dispositions continue over time, for example until high school or college graduation. For details on studies of methods of developing critical thinking skills and dispositions, see the Supplement on Educational Methods .

12. Controversies

Scholars have denied the generalizability of critical thinking abilities across subject domains, have alleged bias in critical thinking theory and pedagogy, and have investigated the relationship of critical thinking to other kinds of thinking.

McPeck (1981) attacked the thinking skills movement of the 1970s, including the critical thinking movement. He argued that there are no general thinking skills, since thinking is always thinking about some subject-matter. It is futile, he claimed, for schools and colleges to teach thinking as if it were a separate subject. Rather, teachers should lead their pupils to become autonomous thinkers by teaching school subjects in a way that brings out their cognitive structure and that encourages and rewards discussion and argument. As some of his critics (e.g., Paul 1985; Siegel 1985) pointed out, McPeck’s central argument needs elaboration, since it has obvious counter-examples in writing and speaking, for which (up to a certain level of complexity) there are teachable general abilities even though they are always about some subject-matter. To make his argument convincing, McPeck needs to explain how thinking differs from writing and speaking in a way that does not permit useful abstraction of its components from the subject-matters with which it deals. He has not done so. Nevertheless, his position that the dispositions and abilities of a critical thinker are best developed in the context of subject-matter instruction is shared by many theorists of critical thinking, including Dewey (1910, 1933), Glaser (1941), Passmore (1980), Weinstein (1990), and Bailin et al. (1999b).

McPeck’s challenge prompted reflection on the extent to which critical thinking is subject-specific. McPeck argued for a strong subject-specificity thesis, according to which it is a conceptual truth that all critical thinking abilities are specific to a subject. (He did not however extend his subject-specificity thesis to critical thinking dispositions. In particular, he took the disposition to suspend judgment in situations of cognitive dissonance to be a general disposition.) Conceptual subject-specificity is subject to obvious counter-examples, such as the general ability to recognize confusion of necessary and sufficient conditions. A more modest thesis, also endorsed by McPeck, is epistemological subject-specificity, according to which the norms of good thinking vary from one field to another. Epistemological subject-specificity clearly holds to a certain extent; for example, the principles in accordance with which one solves a differential equation are quite different from the principles in accordance with which one determines whether a painting is a genuine Picasso. But the thesis suffers, as Ennis (1989) points out, from vagueness of the concept of a field or subject and from the obvious existence of inter-field principles, however broadly the concept of a field is construed. For example, the principles of hypothetico-deductive reasoning hold for all the varied fields in which such reasoning occurs. A third kind of subject-specificity is empirical subject-specificity, according to which as a matter of empirically observable fact a person with the abilities and dispositions of a critical thinker in one area of investigation will not necessarily have them in another area of investigation.

The thesis of empirical subject-specificity raises the general problem of transfer. If critical thinking abilities and dispositions have to be developed independently in each school subject, how are they of any use in dealing with the problems of everyday life and the political and social issues of contemporary society, most of which do not fit into the framework of a traditional school subject? Proponents of empirical subject-specificity tend to argue that transfer is more likely to occur if there is critical thinking instruction in a variety of domains, with explicit attention to dispositions and abilities that cut across domains. But evidence for this claim is scanty. There is a need for well-designed empirical studies that investigate the conditions that make transfer more likely.

It is common ground in debates about the generality or subject-specificity of critical thinking dispositions and abilities that critical thinking about any topic requires background knowledge about the topic. For example, the most sophisticated understanding of the principles of hypothetico-deductive reasoning is of no help unless accompanied by some knowledge of what might be plausible explanations of some phenomenon under investigation.

Critics have objected to bias in the theory, pedagogy and practice of critical thinking. Commentators (e.g., Alston 1995; Ennis 1998) have noted that anyone who takes a position has a bias in the neutral sense of being inclined in one direction rather than others. The critics, however, are objecting to bias in the pejorative sense of an unjustified favoring of certain ways of knowing over others, frequently alleging that the unjustly favoured ways are those of a dominant sex or culture (Bailin 1995). These ways favour:

• reinforcement of egocentric and sociocentric biases over dialectical engagement with opposing world-views (Paul 1981, 1984; Warren 1998)
• distancing from the object of inquiry over closeness to it (Martin 1992; Thayer-Bacon 1992)
• indifference to the situation of others over care for them (Martin 1992)
• orientation to thought over orientation to action (Martin 1992)
• being reasonable over caring to understand people’s ideas (Thayer-Bacon 1993)
• being neutral and objective over being embodied and situated (Thayer-Bacon 1995a)
• doubting over believing (Thayer-Bacon 1995b)
• reason over emotion, imagination and intuition (Thayer-Bacon 2000)
• solitary thinking over collaborative thinking (Thayer-Bacon 2000)
• written and spoken assignments over other forms of expression (Alston 2001)
• attention to written and spoken communications over attention to human problems (Alston 2001)
• winning debates in the public sphere over making and understanding meaning (Alston 2001)

A common thread in this smorgasbord of accusations is dissatisfaction with focusing on the logical analysis and evaluation of reasoning and arguments. While these authors acknowledge that such analysis and evaluation is part of critical thinking and should be part of its conceptualization and pedagogy, they insist that it is only a part. Paul (1981), for example, bemoans the tendency of atomistic teaching of methods of analyzing and evaluating arguments to turn students into more able sophists, adept at finding fault with positions and arguments with which they disagree but even more entrenched in the egocentric and sociocentric biases with which they began. Martin (1992) and Thayer-Bacon (1992) cite with approval the self-reported intimacy with their subject-matter of leading researchers in biology and medicine, an intimacy that conflicts with the distancing allegedly recommended in standard conceptions and pedagogy of critical thinking. Thayer-Bacon (2000) contrasts the embodied and socially embedded learning of her elementary school students in a Montessori school, who used their imagination, intuition and emotions as well as their reason, with conceptions of critical thinking as

thinking that is used to critique arguments, offer justifications, and make judgments about what are the good reasons, or the right answers. (Thayer-Bacon 2000: 127–128)

Alston (2001) reports that her students in a women’s studies class were able to see the flaws in the Cinderella myth that pervades much romantic fiction but in their own romantic relationships still acted as if all failures were the woman’s fault and still accepted the notions of love at first sight and living happily ever after. Students, she writes, should

be able to connect their intellectual critique to a more affective, somatic, and ethical account of making risky choices that have sexist, racist, classist, familial, sexual, or other consequences for themselves and those both near and far… critical thinking that reads arguments, texts, or practices merely on the surface without connections to feeling/desiring/doing or action lacks an ethical depth that should infuse the difference between mere cognitive activity and something we want to call critical thinking. (Alston 2001: 34)

Some critics portray such biases as unfair to women. Thayer-Bacon (1992), for example, has charged modern critical thinking theory with being sexist, on the ground that it separates the self from the object and causes one to lose touch with one’s inner voice, and thus stigmatizes women, who (she asserts) link self to object and listen to their inner voice. Her charge does not imply that women as a group are on average less able than men to analyze and evaluate arguments. Facione (1990c) found no difference by sex in performance on his California Critical Thinking Skills Test. Kuhn (1991: 280–281) found no difference by sex in either the disposition or the competence to engage in argumentative thinking.

The critics propose a variety of remedies for the biases that they allege. In general, they do not propose to eliminate or downplay critical thinking as an educational goal. Rather, they propose to conceptualize critical thinking differently and to change its pedagogy accordingly. Their pedagogical proposals arise logically from their objections. They can be summarized as follows:

• Focus on argument networks with dialectical exchanges reflecting contesting points of view rather than on atomic arguments, so as to develop “strong sense” critical thinking that transcends egocentric and sociocentric biases (Paul 1981, 1984).
• Foster closeness to the subject-matter and feeling connected to others in order to inform a humane democracy (Martin 1992).
• Develop “constructive thinking” as a social activity in a community of physically embodied and socially embedded inquirers with personal voices who value not only reason but also imagination, intuition and emotion (Thayer-Bacon 2000).
• In developing critical thinking in school subjects, treat as important neither skills nor dispositions but opening worlds of meaning (Alston 2001).
• Attend to the development of critical thinking dispositions as well as skills, and adopt the “critical pedagogy” practised and advocated by Freire (1968 [1970]) and hooks (1994) (Dalgleish, Girard, & Davies 2017).

A common thread in these proposals is treatment of critical thinking as a social, interactive, personally engaged activity like that of a quilting bee or a barn-raising (Thayer-Bacon 2000) rather than as an individual, solitary, distanced activity symbolized by Rodin’s The Thinker . One can get a vivid description of education with the former type of goal from the writings of bell hooks (1994, 2010). Critical thinking for her is open-minded dialectical exchange across opposing standpoints and from multiple perspectives, a conception similar to Paul’s “strong sense” critical thinking (Paul 1981). She abandons the structure of domination in the traditional classroom. In an introductory course on black women writers, for example, she assigns students to write an autobiographical paragraph about an early racial memory, then to read it aloud as the others listen, thus affirming the uniqueness and value of each voice and creating a communal awareness of the diversity of the group’s experiences (hooks 1994: 84). Her “engaged pedagogy” is thus similar to the “freedom under guidance” implemented in John Dewey’s Laboratory School of Chicago in the late 1890s and early 1900s. It incorporates the dialogue, anchored instruction, and mentoring that Abrami (2015) found to be most effective in improving critical thinking skills and dispositions.

What is the relationship of critical thinking to problem solving, decision-making, higher-order thinking, creative thinking, and other recognized types of thinking? One’s answer to this question obviously depends on how one defines the terms used in the question. If critical thinking is conceived broadly to cover any careful thinking about any topic for any purpose, then problem solving and decision making will be kinds of critical thinking, if they are done carefully. Historically, ‘critical thinking’ and ‘problem solving’ were two names for the same thing. If critical thinking is conceived more narrowly as consisting solely of appraisal of intellectual products, then it will be disjoint with problem solving and decision making, which are constructive.

Bloom’s taxonomy of educational objectives used the phrase “intellectual abilities and skills” for what had been labeled “critical thinking” by some, “reflective thinking” by Dewey and others, and “problem solving” by still others (Bloom et al. 1956: 38). Thus, the so-called “higher-order thinking skills” at the taxonomy’s top levels of analysis, synthesis and evaluation are just critical thinking skills, although they do not come with general criteria for their assessment (Ennis 1981b). The revised version of Bloom’s taxonomy (Anderson et al. 2001) likewise treats critical thinking as cutting across those types of cognitive process that involve more than remembering (Anderson et al. 2001: 269–270). For details, see the Supplement on History .

As to creative thinking, it overlaps with critical thinking (Bailin 1987, 1988). Thinking about the explanation of some phenomenon or event, as in Ferryboat , requires creative imagination in constructing plausible explanatory hypotheses. Likewise, thinking about a policy question, as in Candidate , requires creativity in coming up with options. Conversely, creativity in any field needs to be balanced by critical appraisal of the draft painting or novel or mathematical theory.

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• Association for Informal Logic and Critical Thinking (AILACT)
• Center for Teaching Thinking (CTT)
• Critical Thinking Across the European Higher Education Curricula (CRITHINKEDU)
• Critical Thinking Definition, Instruction, and Assessment: A Rigorous Approach (criticalTHINKING.net)
• Critical Thinking Research (RAIL)
• Foundation for Critical Thinking
• Insight Assessment
• Partnership for 21st Century Learning (P21)
• The Critical Thinking Consortium
• The Nature of Critical Thinking: An Outline of Critical Thinking Dispositions and Abilities , by Robert H. Ennis

abilities | bias, implicit | children, philosophy for | civic education | decision-making capacity | Dewey, John | dispositions | education, philosophy of | epistemology: virtue | logic: informal

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Critical thinking definition

Critical thinking, as described by Oxford Languages, is the objective analysis and evaluation of an issue in order to form a judgement.

Active and skillful approach, evaluation, assessment, synthesis, and/or evaluation of information obtained from, or made by, observation, knowledge, reflection, acumen or conversation, as a guide to belief and action, requires the critical thinking process, which is why it's often used in education and academics.

Some even may view it as a backbone of modern thought.

However, it's a skill, and skills must be trained and encouraged to be used at its full potential.

People turn up to various approaches in improving their critical thinking, like:

• Developing technical and problem-solving skills
• Engaging in more active listening
• Actively questioning their assumptions and beliefs
• Seeking out more diversity of thought
• Opening up their curiosity in an intellectual way etc.

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Usage of critical thinking comes down not only to the outline of your paper, it also begs the question: How can we use critical thinking solving problems in our writing's topic?

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