Critical Thinking Test
Assess your ability to spot cognitive biases, logical errors, and fallacious arguments.
This test evaluates three facets of critical thinking: detecting cognitive biases, logical reasoning, and argument analysis. For each question, choose the most rigorous answer. Watch out — your intuition may mislead you!
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A study shows that people who eat dark chocolate live longer. What is the most rigorous conclusion?
Logical reasoning
You flipped a coin 5 times and got heads every time. What is the probability of getting heads on the next flip?
Cognitive biases
A politician says: 'My opponent wants to cut the military budget. So he wants to leave our country defenseless.' What bias or logical error do you identify?
Argument analysis
After a widely covered plane crash, you decide to drive instead of fly on your next trip. What bias is at play?
Cognitive biases
'All great artists suffered in their lives. Paul has suffered a lot. Therefore Paul is a great artist.' This reasoning is:
Logical reasoning
You just bought a car and start noticing the same model everywhere. What phenomenon is at play?
Cognitive biases
'If we allow same-sex marriage, soon we'll allow marriage to animals.' This reasoning is an example of:
Argument analysis
A doctor tells you a treatment has a 95% success rate. What additional information is most important to ask about?
Logical reasoning
You've invested $10,000 in a project that isn't working. You're offered the option to invest $5,000 more to save it. What should you consider?
Cognitive biases
'Millions of people believe in astrology, so there must be some truth to it.' This is an example of:
Argument analysis
You read an article that confirms your opinion on a political topic. The most critical reaction would be to:
Cognitive biases
'My grandfather smoked his whole life and lived to 95. So smoking isn't dangerous.' This statement is problematic because:
Logical reasoning
A famous nutrition expert recommends a specific diet. What is the best approach?
Argument analysis
Two events occur simultaneously: an increase in the number of pirates and a rise in global temperature. Can we conclude that:
Logical reasoning
'Either you're for total freedom of speech, or you're for censorship.' This reasoning is an example of:
Argument analysis
Everything you need to know about the Critical Thinking Test
Why assess your critical thinking?
Critical thinking has been listed among the top skills employers look for since the World Economic Forum's Future of Jobs Report in 2020. It refers to the ability to analyze information objectively, identify cognitive biases and reasoning errors, and construct rigorous arguments. In a world where 86% of employees consider misinformation a major problem (Edelman Trust Barometer 2024), being able to tell a sound argument from a fallacy has become essential.
This test covers the three pillars of critical thinking: cognitive biases (confirmation bias, availability bias, gambler's fallacy, sunk cost fallacy, etc.), logical reasoning (correlation vs. causation, affirming the consequent, anecdotal reasoning), and argument analysis (straw man, slippery slope, false dilemma, appeal to popularity). The 15 scenarios are built from real-world cases and examples drawn from cognitive psychology research.
The tool runs entirely in your browser: no personal data is collected, no results are sent to a server. You get an overall score, a score per category, and a detailed answer key with educational explanations for each question. Perfect for improving at your own pace.
Who uses this Critical Thinking Test?
- College and graduate students
- In college essays (1,500–2,500 words) and graduate theses, critical thinking is assessed directly. This test helps you pinpoint weaknesses in bias detection and formal logic before exams like the GRE Analytical Writing or LSAT Logical Reasoning sections.
- Business professionals and managers
- In decision-making contexts — hiring, investment, strategy — cognitive biases like sunk cost fallacy or confirmation bias lead to costly mistakes. This test raises awareness of the most common traps and helps you adopt a more evidence-based approach.
- Journalists and fact-checkers
- Verifying information requires mastering logical errors (correlation vs. causation, anecdotal reasoning) and argumentative fallacies (straw man, appeal to popularity). This test provides targeted practice on the pitfalls that news professionals encounter daily.
- Teachers and trainers
- Usable as a teaching resource in philosophy, science, or methodology courses, this test illustrates key biases and fallacies through real-life scenarios. The detailed answer explanations serve as a launchpad for classroom discussion or professional training workshops.
How does the test work?
The test presents 15 multiple-choice questions spread across three categories: cognitive biases (5 questions), logical reasoning (5 questions), and argument analysis (5 questions). Each question offers 4 possible answers, only one of which is correct. The questions are designed to trick your intuition and reveal automatic cognitive patterns.
A progress bar shows you in real time how many questions you've answered. Once all 15 are complete, click "See my results" to access your overall score (out of 15), your level (Excellent, Good, Average, or Needs work), and a detailed breakdown by category with visual progress bars.
The detailed answer key shows, for each question, your answer, the correct answer if different, and an educational explanation of the bias or logical error involved. Processing is entirely client-side: no answers are sent to a server, and you can retake the test as many times as you like.
Frequently asked questions
- How long does the test take to complete?
- The test has 15 questions and typically takes 10 to 15 minutes. There is no timer: take your time thinking through each scenario to get a result that truly reflects your critical thinking ability.
- What do the three test categories measure?
- Cognitive biases evaluate your ability to spot systematic judgment distortions (confirmation bias, availability bias, sunk cost fallacy). Logical reasoning tests your rigor with formal errors (correlation/causation, affirming the consequent). Argument analysis measures your skill at detecting rhetorical fallacies (straw man, slippery slope, false dilemma, appeal to popularity).
- Can I actually improve my critical thinking with this test?
- Yes. Research in cognitive psychology shows that mere exposure to cognitive biases and logical errors significantly improves the ability to detect them (Morewedge et al., 2015). By carefully reading the detailed explanations after each attempt, you familiarize yourself with the mechanisms behind each trap and learn to recognize them in everyday life.
- Is my data sent to a server?
- No. The entire test — questions, score calculation, and answer explanations — runs in your browser via JavaScript. No answers, results, or personal data are transmitted, stored, or logged on any server. You can use the tool offline once the page has loaded.