from the lab · cognition

The 2-back

A quick working-memory check — your own baseline, taken whenever you like. Squares light up one at a time. Tap Match (or press space) whenever the current square is in the same spot it was 2 steps ago. Miss a couple — everyone does. It's ~1 minute.

This isn't a test against anyone else — it's a marker we can re-take to watch your trend over time. No scores are shared.

Your results can be saved and tracked over time — look for the toggle on the result page.

Begin → not now