Five short games. The rules change without warning. How fast you notice is the whole point.
Every choice you make lands here as a tick. Tall means rewarded. The gold dashes are the moments the rules silently reversed. By the end you'll be looking at your own data.
Research on Alzheimer's models found something unexpected: the ability to adapt when the rules change broke down before spatial memory did. Animals learned that one action earned a reward, the rule flipped, and healthy animals switched quickly — the model animals kept repeating the old action. Those same animals still navigated and remembered locations normally.
The brain signature was overactivity in the medial prefrontal cortex spreading into the striatum — the loop that lets you change your mind.
Source: Earth.com coverage of a Texas A&M study in Nature Communications, July 2026. Findings are from animal models and have not been shown to transfer to people.
Play in order — later games assume the earlier ones.
Nothing is saved. Closing this tab clears the session — download your data from the report if you want to keep it.
Nothing is running. The next trial starts when you resume.
Trials kept advancing while the screen was hidden, so some of them recorded a response you never had a chance to make. Scoring that would be unfair to you and useless to us, so this run has been discarded rather than saved.
Everything you finished before this game is untouched.
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Drive a simulated player through the whole battery so you can test the games, the raster and the scoring pipeline without playing for nine minutes.
Notices reversals within a couple of trials, ignores single misleading losses, strong spatial span.
Speed