Squares light up one at a time. Press the button whenever the current position matches the position N steps back. Clear a 20-trial block accurately and N goes up by one.
How it works
Squares light up one at a time. Press the button whenever the current position matches the position N steps back. Clear a 20-trial block accurately and N goes up by one. Most adults are comfortable at 2-back and struggle at 3-back; 4-back and above is rare. N-back correlates with working-memory capacity, but evidence that training your N-back score transfers to general intelligence (g) is weak.
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Last updated: 2026-08-26 Β· β Reviewed by the All-Lifes editorial team Β· About Β· Methodology