Key evidence & numbers
| Evidence | Context |
|---|---|
| Roughly 3–5 chunks | a synthesis across experiments under specified conditions, not a newly measured worldwide average. Original abstract |
| Units matter | familiar groups can be handled as chunks, so item counts do not automatically reveal a pure storage capacity. Review |
| No matching Helibrain cutoff | a visual pattern game does not reproduce all the review's experimental controls. |
What affects it?
Rehearsal, prior knowledge and grouping can support recall. The review's restricted-capacity estimate deliberately separates those sources of help from the central limit it describes. Review
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Common questions
What is a chunk?
A unit held together by meaning or familiarity. A familiar pattern may be easier to treat as a unit than unrelated items.
Does this limit long-term knowledge?
The review concerns temporary storage under controlled conditions. It does not set a limit on everything you can learn.
Is number memory the same measurement?
The presentation and scoring differ. A digit span and a visual pattern level should not be compared as identical units.
Sources
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