Great apes' risk-taking strategies in a decision making task.

Bibliographic Collection: 
MOCA Reference, APE
Publication Type: Journal Article
Authors: Haun, Daniel B M; Nawroth, Christian; Call, Josep
Year of Publication: 2011
Journal: PLoS One
Volume: 6
Issue: 12
Pagination: e28801
Date Published: 2011
Publication Language: eng
ISSN: 1932-6203
Keywords: Animals, Decision making, Hominidae, Risk-Taking, Species Specificity

We investigate decision-making behaviour in all four non-human great ape species. Apes chose between a safe and a risky option across trials of varying expected values. All species chose the safe option more often with decreasing probability of success. While all species were risk-seeking, orangutans and chimpanzees chose the risky option more often than gorillas and bonobos. Hence all four species' preferences were ordered in a manner consistent with normative dictates of expected value, but varied predictably in their willingness to take risks.

DOI: 10.1371/journal.pone.0028801
Alternate Journal: PLoS ONE
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