Regression to the Mean
by Anonymous
Adjust luck's share in a score and see why the top scorers' average slides back toward the middle on a second test, though no one's skill changed.
#statistics#chance#cognitivebias#criticalthinking#regressiontothemean#adults#literacy#psychology#decisionmaking
About this app
Regression to the Mean is an interactive statistics lesson showing why a group selected for unusually high first-round scores tends to score closer to average in a second round. Adjust how many people to keep and how much of each score comes from luck, then compare top and bottom groups across two rounds. A judgment quiz also demonstrates why praise or scolding may be mistaken for the cause of a change that regression to the mean explains on its own.
Use cases
- Students learning introductory statistics
- Adults exploring cognitive biases and decision-making
- Teachers demonstrating regression to the mean
- Readers interested in psychology and critical thinking
Features
- Interactive controls for selection size and luck percentage
- Comparison of first- and second-round averages for top and bottom groups
- Visualization of how the top-group drop changes as luck increases
- Missions that test key regression-to-the-mean concepts
- Multiple-choice quiz about praise, scolding, and causal judgment