Experiment Screens

Stereotypes and Overconfidence Screens

A timed quiz: they had 2 minutes to answer as many questions as possible. They could only see one question at a time.

Part 2: Reveal the score that you think the other participant (or yourself in the ego treatment) got in the quiz by choosing a probability matrix. This allows me to track their belief about the score without having to directly ask them.

Part 2.2: Choose gamble A, B or C depending on what you think is the exogenous variable (rate). The probability of success is maximized by matching the rate. This allows me to trak their belief about the exhogenous variable. 

Part 2 (feedback): After each  choice they received a sample of 10 randomly drawn outcomes. Each outcome was a success with the probability given by their choice, the true rate and the true score.

Learning with Simple Mental Models

The number of variables they could use is randomized in every round. They can choose which variables they want to use (up to the allowed number for that round). Given the information in the variables they choose, they need to predict the outcome (Red/Blue). They then learn if their prediction is correct and proceed to the next round.