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. © 2011 Haun et al.
CITATION STYLE
Haun, D. B. M., Nawroth, C., & Call, J. (2011). Great Apes’ risk-taking strategies in a decision making task. PLoS ONE, 6(12). https://doi.org/10.1371/journal.pone.0028801
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