NDLI: How the Thatcher illusion reveals evolutionary differences in the face processing of primates

Content Provider	Springer Nature Link
Author	Weldon, Kimberly B. Taubert, Jessica Smith, Carolynn L. Parr, Lisa A.
Copyright Year	2013
Abstract	Face recognition in humans is a complex cognitive skill that requires sensitivity to unique configurations of eyes, mouth, and other facial features. The Thatcher illusion has been used to demonstrate the importance of orientation when processing configural information within faces. Transforming an upright face so that the eyes and mouth are inverted renders the face grotesque; however, when this “Thatcherized” face is inverted, the effect disappears. Due to the use of primate models in social cognition research, it is important to determine the extent to which specialized cognitive functions like face processing occur across species. To date, the Thatcher illusion has been explored in only a few species with mixed results. Here, we used computerized tasks to examine whether nonhuman primates perceive the Thatcher illusion. Chimpanzees and rhesus monkeys were required to discriminate between Thatcherized and unaltered faces presented upright and inverted. Our results confirm that chimpanzees perceived the Thatcher illusion, but rhesus monkeys did not, suggesting species differences in the importance of configural information in face processing. Three further experiments were conducted to understand why our results differed from previously published accounts of the Thatcher illusion in rhesus monkeys.
Starting Page	691
Ending Page	700
Page Count	10
File Format	PDF
ISSN	14359448
Journal	Animal Cognition
Volume Number	16
Issue Number	5
e-ISSN	14359456
Language	English
Publisher	Springer Berlin Heidelberg
Publisher Date	2013-02-19
Publisher Place	Berlin, Heidelberg
Access Restriction	Subscribed
Subject Keyword	Visual illusion Face recognition Chimpanzee Rhesus monkey Evolution Matching-to-sample Behavioural Sciences Zoology Human Physiology Evolutionary Biology
Content Type	Text
Resource Type	Article
Subject	Experimental and Cognitive Psychology Ecology, Evolution, Behavior and Systematics

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