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Reading trustworthiness in faces without recognizing faces.

Alexander Todorov1, Bradley Duchaine

  • 1Department of Psychology and Center for the Study of Brain, Mind and Behavior, Princeton University, Princeton, NJ 08544-1010, USA. atodorov@princeton.edu

Cognitive Neuropsychology
|July 1, 2008
PubMed
Summary
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Individuals with developmental prosopagnosia can still accurately judge trustworthiness in novel faces, even with severe face recognition deficits. This suggests independent brain mechanisms for identity and impression formation.

Area of Science:

  • Cognitive Neuroscience
  • Social Psychology
  • Neuroscience

Background:

  • Developmental prosopagnosia (DP) involves significant deficits in recognizing familiar faces and perceiving facial identity.
  • Previous research suggests impairments in trustworthiness judgments in individuals with bilateral amygdala damage.

Purpose of the Study:

  • To investigate whether individuals with DP can make accurate trustworthiness judgments of novel faces.
  • To explore the functional independence of face identity processing and person impression formation.

Main Methods:

  • Four individuals with DP were tested using three distinct sets of facial stimuli.
  • Judgments were compared against control participants' assessments.
  • Stimuli included varied faces and standardized faces with neutral expressions and direct gaze.

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Main Results:

  • Two individuals with DP showed high agreement with control judgments.
  • The other two individuals exhibited weaker but still normal-range agreement.
  • Performance across different face sets was correlated, indicating consistent judgment mechanisms.

Conclusions:

  • Normal trustworthiness judgments by some individuals with DP suggest functional independence between face identity encoding and person impression formation.
  • These findings challenge the notion that severe face perception deficits universally impair social cognition related to faces.