Cognitive Bias Test: Measure Your Rationality Score
A free cognitive bias test: 10 everyday scenarios that check for 10 common biases, from anchoring to the sunk cost fallacy. Are you as rational as you think?
COGNITIVE
DIAGNOSTIC
Why Measure Your Rationality?
Cognitive biases are systematic patterns of deviation from norm or rationality in judgment. They are "mental shortcuts" that, while efficient, often lead to predictable errors.
This scanner calibrates your defenses against those errors, because you can't correct a bias you haven't noticed. Think of it as a cognitive bias detector for your daily life.
The 10 Biases This Test Checks
- Confirmation BiasLooking for evidence that agrees with you and skipping the rest.
- Anchoring BiasLetting the first number you see set the scale for every judgment after it.
- Sunk Cost FallacySticking with something because of what you have already spent on it.
- Availability BiasJudging how likely something is by how easily an example comes to mind.
- Bandwagon EffectWanting something more because other people want it.
- Dunning-Kruger EffectOverrating your skill in areas where you know the least.
- Hindsight BiasFeeling you “knew it all along” once the outcome is known.
- Optimism BiasUnderestimating how long things take and how likely problems are.
- Authority BiasTrusting a claim because of who said it rather than the evidence.
- Status Quo BiasPreferring the current option just because it is the current option.
Applying Your Rationality Quotient
Your results are a snapshot of your current decision-making habits. High-stakes performers, from pilots to fund managers, use similar diagnostics to check their reasoning.
To improve your score, we recommend practicing with our behavioral simulations, which are designed to expose these biases under controlled pressure.
Frequently Asked Questions
What is a cognitive bias test?
A cognitive bias test is an assessment designed to reveal the systematic errors in thinking that affect your judgments and decisions. It helps you identify blind spots like Confirmation Bias or Overconfidence.
Which biases does this cognitive bias test check?
Ten: confirmation bias, anchoring bias, the sunk cost fallacy, availability bias, the bandwagon effect, the Dunning-Kruger effect, hindsight bias, optimism bias, authority bias and status quo bias. Each one appears in an everyday scenario, and your answer shows whether that bias steered your choice.
How long does the cognitive bias test take?
There are 10 scenarios with three or four answers each. Most people finish in 5 to 7 minutes. Answer with what you would actually do, not what you think the rational answer is supposed to be.
How accurate is this rationality score?
Treat it as a mirror, not a measurement. The scenarios are modelled on classic bias experiments, but 10 questions cannot give a reliable score for any one person, and the test has not been validated. It is useful for noticing which biases you are prone to in situations like these.
Can I improve my rationality score?
Yes. Cognitive biases are habits of mind. By becoming aware of them (metacognition) and using decision-making frameworks like the 10-10-10 Rule or Inversion, you can retrain your brain to be less susceptible to them.