Cognitive Bias Detector — Spot Hidden Biases in Real-World Scenarios
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Cognitive Bias Detector

Read real-world scenarios and identify the cognitive bias at play. 20 questions. How many can you spot?

Every day, your brain takes invisible shortcuts that warp your judgment. These cognitive biases affect how you spend money, judge people, evaluate risk, and form opinions.

In this test, you'll read 20 realistic scenarios and try to identify which cognitive bias is driving the decision. The wrong answers are designed to be plausible, so think carefully.

Confirmation Bias Anchoring Sunk Cost Dunning-Kruger Availability Heuristic Bandwagon Effect Hindsight Bias Framing Effect Survivorship Bias + 11 more

What Are Cognitive Biases?

Cognitive biases are systematic errors in thinking that affect the decisions and judgments people make. They arise from the brain's attempt to simplify information processing and are deeply rooted in human psychology. While these mental shortcuts (heuristics) often serve us well, they can lead to irrational decisions, flawed reasoning, and poor judgment.

Psychologists Daniel Kahneman and Amos Tversky pioneered much of the research on cognitive biases in the 1970s, demonstrating that humans are not the rational decision-makers that classical economics assumed. Their work earned Kahneman the Nobel Prize in Economics in 2002.

Why Test Your Bias Awareness?

Research in cognitive debiasing shows that one of the most effective ways to reduce the influence of biases is simply to learn about them. When you can name a bias, you can notice it in action. This quiz is designed to sharpen your pattern recognition by presenting realistic scenarios where biases operate subtly, not obviously.

The 20 Biases in This Test

This quiz covers 20 of the most impactful cognitive biases, from well-known ones like confirmation bias and sunk cost fallacy to less obvious ones like the IKEA effect, decoy effect, and peak-end rule. Each scenario is designed to be genuinely tricky, with plausible distractors that test whether you truly understand the mechanism behind each bias.

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