Document Detail


Chimpanzees and bonobos distinguish between risk and ambiguity.
MedLine Citation:
PMID:  21106573     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
Although recent research has investigated animal decision-making under risk, little is known about how animals choose under conditions of ambiguity when they lack information about the available alternatives. Many models of choice behaviour assume that ambiguity does not impact decision-makers, but studies of humans suggest that people tend to be more averse to choosing ambiguous options than risky options with known probabilities. To illuminate the evolutionary roots of human economic behaviour, we examined whether our closest living relatives, chimpanzees (Pan troglodytes) and bonobos (Pan paniscus), share this bias against ambiguity. Apes chose between a certain option that reliably provided an intermediately preferred food type, and a variable option that could vary in the probability that it provided a highly preferred food type. To examine the impact of ambiguity on ape decision-making, we interspersed trials in which chimpanzees and bonobos had no knowledge about the probabilities. Both species avoided the ambiguous option compared with their choices for a risky option, indicating that ambiguity aversion is shared by humans, bonobos and chimpanzees.
Authors:
Alexandra G Rosati; Brian Hare
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't; Research Support, U.S. Gov't, Non-P.H.S.     Date:  2010-11-24
Journal Detail:
Title:  Biology letters     Volume:  7     ISSN:  1744-957X     ISO Abbreviation:  Biol. Lett.     Publication Date:  2011 Feb 
Date Detail:
Created Date:  2011-01-13     Completed Date:  2011-05-10     Revised Date:  2013-07-03    
Medline Journal Info:
Nlm Unique ID:  101247722     Medline TA:  Biol Lett     Country:  England    
Other Details:
Languages:  eng     Pagination:  15-8     Citation Subset:  IM    
Affiliation:
Department of Evolutionary Anthropology, Center for Cognitive Neuroscience, Duke University, Durham, NC 27708, USA. alexandra.rosati@duke.edu
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MeSH Terms
Descriptor/Qualifier:
Animals
Behavior, Animal*
Decision Making*
Food Preferences*
Pan paniscus*
Pan troglodytes*
Risk
Comments/Corrections

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