The primacy effect is the tendency, when people are asked to freely recall a list of items, to remember items presented near the beginning of the list better than items presented in the middle. It is one half of the serial-position effect, first studied by the psychologist Hermann Ebbinghaus, describing how recall accuracy varies with an item's position in a list; the standard explanation is that early items receive more rehearsal and are more likely to have already been transferred into long-term memory by the time recall is tested. The primacy effect is generally strengthened by slower presentation of the list and by shorter lists, and it is weakened when the list is presented more quickly.
Facts
Core ClaimThe primacy effect is the tendency to recall items presented near the beginning of a list better than items presented in the middle, because early items receive more rehearsal and stronger encoding into long-term memory. 1 First Described YearWikipedia's Hermann Ebbinghaus article dates his monumental memory work, Uber das Gedachtnis, to 1885 and states in its findings summary that he documented the serial position effect (of which primacy is one of the two named components); the year is drawn from the article's own publication date for that work, not a sentence naming 1885 and serial position together in one breath. Classification
Type of Phenomenon Connections
Associated With
First studied the serial-position effect, of which the primacy effect is one half.
In Branch
Sources
1. Wikipedia: Serial-Position Effect
Wikimedia FoundationPrimacy effect section, first sentence
In psychology and sociology, the primacy effect (also known as the primacy bias) is a cognitive bias that results in a subject recalling primary information presented better than information presented later on.
lead section, phenomenon-kind classification (primacy)
Among earlier list items, the first few items are recalled more frequently than the middle items (the primacy effect).
2. Wikipedia: Hermann Ebbinghaus
Wikimedia FoundationFindings summary paragraph, following the 1885 Uber das Gedachtnis publication date given earlier in the articleQuote, Findings summary paragraph, following the 1885 Uber das Gedachtnis publication date given earlier in the article
Ebbinghaus had also documented the serial position effect, which describes how the position of an item affects recall.
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