Journal
JOURNAL OF GENERAL PSYCHOLOGY
Volume 134, Issue 2, Pages 199-216Publisher
HELDREF PUBLICATIONS
DOI: 10.3200/GENP.134.2.199-216
Keywords
delay maintenance; delay of gratification; rhesus macaque; self-control
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Funding
- NICHD NIH HHS [HD-38051] Funding Source: Medline
- EUNICE KENNEDY SHRIVER NATIONAL INSTITUTE OF CHILD HEALTH &HUMAN DEVELOPMENT [P01HD038051] Funding Source: NIH RePORTER
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The authors tested the self-control of rhesus macaques by assessing if they could refrain from reaching into a food container to maximize the accumulation of sequentially delivered food items (a delay-maintenance task). Three different versions of the task varied the quantity and quality of available food items. In the first 2 versions, food items accumulated across the length of the trial until a monkey consumed the items. In the 3rd task, a single less-preferred food item preceded a single more-preferred food item. Some monkeys delayed gratification even with relatively long delays between deliveries of items. However, the data suggested that self-control, in the majority of tested individuals, was not significantly different across different task versions and that self-control by macaques was not as prevalent in these tasks as it is in chimpanzees and human children.
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