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Thesaurus of the Cognitive Psychology of Human Memory
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May 20, 2026
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| Id | http://data.loterre.fr/ark:/67375/P66-Z65L5PQD-M
http://data.loterre.fr/ark:/67375/P66-Z65L5PQD-M
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| Preferred Name | category size effect |
| Definitions |
A memory phenomenon observed when the decision time in a sentence verification task is shorter for sentences about a member of a smaller semantic category (e.g., a canary is a bird) compared to a larger category (e.g., a canary is an animal).
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| Type | http://www.w3.org/2004/02/skos/core#Concept |
All Properties
| definition | A memory phenomenon observed when the decision time in a sentence verification task is shorter for sentences about a member of a smaller semantic category (e.g., a canary is a bird) compared to a larger category (e.g., a canary is an animal). |
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| prefLabel | category size effect
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| bibliographicCitation | Collins, A. M., & Quillian, M. R. (1970). Does category size affect categorization time? Journal of verbal learning and verbal behavior, 9(4), 432–438. https://doi.org/10.1016/S0022-5371(70)80084-6
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| scopeNote | Suppose that the following two sentences are to be verified: 1. The canary is a bird; 2. The canary is an animal. The decision time is shorter for the first sentence: the Bird category is less extensive than the Animal category. There are cases where the reaction time is shorter when the decision concerns the membership of a larger category: the reversal category size effect.
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| broader | |
| creator | Frank Arnould
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| inScheme | |
| created | December 4, 2017
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| modified | November 28, 2025
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