An interactive simulator for visualizing how false positives explode in mass screenings for low-prevalence problems. Relevant across diverse domains including security (e.g., Chat Control; iBorderCtrl), medicine (e.g., mammography; PSA testing), and so much more.

The purpose is to begin to more easily visualize how prevalence, sensitivity, specificity, investigative capacity, and strategic behavior interact to shape real-world outcomes.

Interactive tool: https://verawilde.github.io/rarity-roulette/

Would love feedback, critiques, and ideas for improvements.