Sequence Memory Test
Watch the squares flash, then repeat the sequence. Each success adds one step — how long a sequence can you hold?
What this test measures
Visuospatial short-term memory span: how many sequential spatial positions you can hold and reproduce in order. The grid flashes a sequence starting at 3 squares; every correct reproduction adds one square until you make a mistake. Your score is the longest sequence you completed. This is distinct from verbal memory (remembering words or digits) — it engages the visuospatial sketchpad in Baddeley's working memory model.
The science behind it
This paradigm is a computerized variant of the Corsi block-tapping task, introduced by Philip Corsi in 1972 and now one of neuropsychology's standard memory measures. The definitive standardization by Kessels et al. 2000 (Applied Neuropsychology) puts the healthy adult mean span at 6.0 blocks with an SD around 2.0 — strikingly close to Miller's famous 'seven plus or minus two' for verbal span. Span declines gradually with age and is sensitive to attention load. Gaming research finds modest working-memory advantages for players: Thompson et al. 2013's meta-analysis (Perspectives on Psychological Science) reports positive associations between video game experience and working memory measures, and Kowal et al. 2018 found esports players outperform casuals on cognitive batteries that include memory tasks.
How to improve your memory span
Raw span is fairly stable, but strategy makes a measurable difference. Chunking — grouping positions into shapes or paths ('L-shape, then diagonal') — is the best-documented technique and is how memory athletes exceed normal spans. Rehearse the sequence during playback rather than after, trace the path with your eyes, and stay under low working-memory load (no music with lyrics, no split attention). Training effects on span tasks are real but narrow: practice improves the trained task substantially while far transfer to general intelligence remains debated in the literature.
Frequently Asked Questions
What is a good sequence memory score?
The healthy adult mean is a span of 6 (Kessels et al. 2000). Reaching 8 puts you around the top 16%, and 10+ is roughly the top 2-3%. Scores below 4 in a distraction-free attempt are worth re-testing when rested.
Is this the same as the Corsi block test?
It is a computerized variant of the same paradigm: sequential spatial positions reproduced in order, with span as the score. Clinical Corsi uses 9 physical blocks and a fixed administration protocol; our grid and adaptive difficulty differ slightly, so treat clinical norms as a reference rather than a diagnosis.
Why do I fail at the same length every time?
That plateau is your span — working memory capacity is a stable trait with a hard ceiling around 4±1 chunks (Cowan 2001). To break through, change strategy: chunk positions into shapes so several squares count as one item.
Does sequence memory decline with age?
Yes, gradually. Corsi span declines roughly half a block per decade after middle age in normative studies (Kessels et al. 2000). Staying cognitively and physically active is associated with slower decline.
Verbal memory vs. visual memory — what's the difference?
They use partly separate systems: verbal span (digits, words) engages the phonological loop, while this test engages the visuospatial sketchpad (Baddeley's model). People can be strong in one and average in the other, which is why test batteries measure both.
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