ESP Card Game

This is an ESP (extra-sensory perception) test in the tradition of Zener cards. Each attempt, the app secretly picks one hidden target card and you choose the one you sense is the target — with no feedback until the end.

Chance. With 4 cards you'd be right about 25% of the time by pure luck; with 8 cards 12.5%; with 16 cards 6.25%. Beating those rates by a little is normal random variation.

Reading your score. The results screen compares your hits to what chance predicts and shows a p-value — the probability of a result at least this far from chance if only luck were at work. A small p-value (below 0.05) is the usual bar for "unlikely to be just luck." One game is never proof of anything; watch the trend across many games in History.