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Digit Span

◈ E2 · Conditional

Evidence for: trained span tasks (near transfer)

How to play

Digit Span

Digits appear one at a time. When they disappear, type them back in order. Get it right and the sequence grows; miss both tries at a length and the round ends.

This is a practice exercise, not a medical test. Response times in a browser are only comparable with yourself on the same device.

What does this train?

Part of the method Digit Span. On the web you answer for real, so we can measure accuracy and response time. A YouTube video can only ask you to score yourself.

What the research says

Last reviewed 2026-10
◈ E2 · Conditional

Working-memory training reliably improves the trained span task and closely related tasks. Trained & similar tasks [1][2]

✕ Not supported

Meta-analyses find no convincing improvement in intelligence or untrained abilities. Other abilities [2][3]

References

  1. Baddeley, A. D., & Hitch, G. (1974). Working memory. Psychology of Learning and Motivation, 8, 47–89. https://doi.org/10.1016/S0079-7421(08)60452-1
  2. Melby-Lervåg, M., & Hulme, C. (2013). Is working memory training effective? A meta-analytic review. Developmental Psychology, 49(2), 270–291. https://doi.org/10.1037/a0028228
  3. Sala, G., & Gobet, F. (2019). Cognitive training does not enhance general cognition. Trends in Cognitive Sciences, 23(1), 9–20. https://doi.org/10.1016/j.tics.2018.10.004

Reading your results

Compared with yourself: personal best and your recent sessions. We never rank you against “the population” or convert scores into IQ.