The current trial waits while help is open and replays when you close it. Your run is kept.
Controls
- Match
- Space or M · Match button
- Level
- Pick 1–4 back before you start
How to play
A square lights up, one position at a time. Press Match whenever it is in the same place as N steps earlier. Start at 1-back and move up when you pass with 80% or better.
The taskEach trial lights one of nine squares for a moment. Press Match when it is the same square as N trials earlier. About a third of trials are matches; the first N can never be.
ScoringAccuracy counts both pressing on matches and holding off on non-matches. 80% or better is a pass, and passes count toward your best (highest level, then accuracy).
Honest noteN-back is a standard working-memory exercise. Practice makes you better at N-back; evidence that it raises general intelligence is weak.
1 player · Keyboard · Mouse · Touch
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