The functional basis of face evaluation

Nikolaas N. Oosterhof, Alexander Todorov

Research output: Contribution to journalArticle

771 Scopus citations

Abstract

People automatically evaluate faces on multiple trait dimensions, and these evaluations predict important social outcomes, ranging from electoral success to sentencing decisions. Based on behavioral studies and computer modeling, we develop a 2D model of face evaluation. First, using a principal components analysis of trait judgments of emotionally neutral faces, we identify two orthogonal dimensions, valence and dominance, that are sufficient to describe face evaluation and show that these dimensions can be approximated by judgments of trustworthiness and dominance. Second, using a data-driven statistical model for face representation, we build and validate models for representing face trustworthiness and face dominance. Third, using these models, we show that, whereas valence evaluation is more sensitive to features resembling expressions signaling whether the person should be avoided or approached, dominance evaluation is more sensitive to features signaling physical strength/weakness. Fourth, we show that important social judgments, such as threat, can be reproduced as a function of the two orthogonal dimensions of valence and dominance. The findings suggest that face evaluation involves an overgeneralization of adaptive mechanisms for inferring harmful intentions and the ability to cause harm and can account for rapid, yet not necessarily accurate, judgments from faces.

Original languageEnglish (US)
Pages (from-to)11087-11092
Number of pages6
JournalProceedings of the National Academy of Sciences of the United States of America
Volume105
Issue number32
DOIs
StatePublished - Aug 12 2008

All Science Journal Classification (ASJC) codes

  • General

Keywords

  • Emotions
  • Face perception
  • Social cognition

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