📈 Signal Detection Booth 3D: d-prime, ROC Curve, Criterion and Payoff

Signal detection theory in a 3D observation booth: two Gaussian ridges for noise and signal+noise, a sliding decision criterion that turns trials into hits, misses, false alarms and correct rejections, a live ROC curve, and the payoff-maximising ideal observer.

3D · Three.js / WebGL renderer · 60 FPS target · runs fully client-side, no install