Delay of gratification by chimpanzees (Pan troglodytes) in working and waiting situations.

Abstract

We tested four chimpanzees in a self-control task in which food rewards accumulated as long as they were not eaten. In one condition, the chimpanzees had to perform a computer task that directly led to the delivery of the food rewards. In another condition, working on the computerized task was not required and any such work was not linked to the delivery of… (More)
DOI: 10.1016/j.beproc.2008.11.008

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