Document Detail

Chimpanzees know that others make inferences.
MedLine Citation:
PMID:  21282649     Owner:  NLM     Status:  MEDLINE    
If chimpanzees are faced with two opaque boards on a table, in the context of searching for a single piece of food, they do not choose the board lying flat (because if food was under there it would not be lying flat) but, rather, they choose the slanted one- presumably inferring that some unperceived food underneath is causing the slant. Here we demonstrate that chimpanzees know that other chimpanzees in the same situation will make a similar inference. In a back-and-forth foraging game, when their competitor had chosen before them, chimpanzees tended to avoid the slanted board on the assumption that the competitor had already chosen it. Chimpanzees can determine the inferences that a conspecific is likely to make and then adjust their competitive strategies accordingly.
Martin Schmelz; Josep Call; Michael Tomasello
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't     Date:  2011-01-31
Journal Detail:
Title:  Proceedings of the National Academy of Sciences of the United States of America     Volume:  108     ISSN:  1091-6490     ISO Abbreviation:  Proc. Natl. Acad. Sci. U.S.A.     Publication Date:  2011 Feb 
Date Detail:
Created Date:  2011-02-17     Completed Date:  2011-04-14     Revised Date:  2013-06-30    
Medline Journal Info:
Nlm Unique ID:  7505876     Medline TA:  Proc Natl Acad Sci U S A     Country:  United States    
Other Details:
Languages:  eng     Pagination:  3077-9     Citation Subset:  IM    
Department of Developmental and Comparative Psychology, Max Planck Institute for Evolutionary Anthropology, D-04103 Leipzig, Germany.
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MeSH Terms
Choice Behavior / physiology
Cognition / physiology*
Competitive Behavior*
Pan troglodytes / psychology*
Social Perception*
Theory of Mind / physiology*

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

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