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Brain Cogn. 2006 Oct;62(1):30-42. Epub 2006 May 5.

Three studies on configural face processing by chimpanzees.

Author information

1
Division of Psychiatry and Behavioral Sciences, Emory University, Atlanta, GA 30322, USA. parr@rmy.emory.edu

Abstract

Previous studies have demonstrated the sensitivity of chimpanzees to facial configurations. Three studies further these findings by showing this sensitivity to be specific to second-order relational properties. In humans, this type of configural processing requires prolonged experience and enables subordinate-level discriminations of many individuals. Chimpanzees showed evidence of a composite-like effect for conspecific but not human faces despite extensive experience with humans. Chimpanzee face recognition was impaired only when manipulations targeted second-order properties. Finally, face processing was impaired when individual features were blurred through pixelation. Results confirm that chimpanzee face discrimination, like humans, depends on the integrity of second-order relational properties.

PMID:
16678323
PMCID:
PMC2826113
DOI:
10.1016/j.bandc.2006.03.006
[Indexed for MEDLINE]
Free PMC Article
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