Oddly Wired
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decision making

Your brain prefers simple patterns over complex reality.

The 'Representativeness Heuristic' leads you to judge the probability of an event by how much it resembles your mental prototype.

If you describe a shy person who loves reading, you are more likely to guess they are a librarian than a salesperson. Your brain ignores base-rate statistics in favor of a compelling mental image.

You value a good story over accurate probability.

Where this comes from

Study
Kahneman and Tversky, 'Judgment under uncertainty', 1974
What the check found
The definition aligns with the seminal 1974 paper by Tversky and Kahneman, which identifies representativeness as evaluating probability based on the similarity between an object and a category.
Confidence
Well replicated

Related

One of these every day, and every one names the study it came from. When a finding is contested, it says so.