Cognitive Reflection Test · Extended Edition

Your brain is lying to you.
Can you catch it?

20 questions specifically designed to trigger your fast-thinking System 1 brain into giving the wrong answer — then show you why. Covers CRT classics, probability traps, cognitive biases, and lateral thinking.

20
Questions
30s
Per Question
6
Categories
Average score on this test: 11/20. Top 10%: 17/20.
Cognitive Reflection
Classic CRT traps where the intuitive answer is wrong
Probability & Stats
Monty Hall, base rates, gambler's fallacy
Cognitive Biases
Sunk cost, anchoring, conjunction fallacy
Logic & Reasoning
Syllogisms, the Wason card task, deduction
Numerical Traps
Math that looks simpler than it is
Lateral Thinking
Questions that assume things that aren't true
Question 1 of 20
30
0 / 0
0
out of 20
Your Result

0
Correct
0
Wrong
0
Best Streak
0s
Avg Time

Question Review

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