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Psychology, Made Simple

Understand Yourself & Others

Using everyday examples, this level walks you through a few common quirks of the brain, what emotions actually do, and the patterns behind motivation and habits.

Unit 2
Probability Intuition & Judgment Biases
Where intuition systematically misjudges probability — starting with the base rate fallacy: before trusting impressive-looking evidence, ask what the underlying rate is.
  1. 1The Base Rate Fallacy: Why Positive Does Not Mean SickStart with a hypothetical 10,000-person screening and separate sensitivity, false-positive rate, and positive predictive value6 Q