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Perceptual and Category Processing of the Uncanny Valley Hypothesis' Dimension of Human Likeness: Some Methodological Issues
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Adaptation improves face trustworthiness discrimination.

B D Keefe1, M Dzhelyova, D I Perrett

  • 1Department of Psychology, University of York York, UK.

Frontiers in Psychology
|June 27, 2013
PubMed
Summary
This summary is machine-generated.

Adapting to faces of a specific trustworthiness level enhances sensitivity to similar faces. This perceptual adaptation improves facial trustworthiness discrimination, even across different genders and identities.

Keywords:
adaptationface adaptationface discriminationface perceptionface trustworthinessfunctional benefitpsychological

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Area of Science:

  • Cognitive Psychology
  • Neuroscience
  • Visual Perception

Background:

  • Facial characteristic adaptation influences perception and discrimination.
  • Previous research shows adaptation biases perception and improves discrimination.

Purpose of the Study:

  • To investigate if adapting to facial trustworthiness levels enhances sensitivity around the adapted level.
  • To determine if adaptation to one trustworthiness level affects discrimination of another.

Main Methods:

  • Participants adapted to trustworthy or untrustworthy faces.
  • Just-noticeable differences (JNDs) were measured using a two-interval forced-choice (2-IFC) adaptive staircase procedure.
  • Psychometric functions derived JNDs for trustworthy and untrustworthy faces.

Main Results:

  • Adaptation improved sensitivity to faces of the same trustworthiness level compared to no adaptation.
  • No sensitivity improvement was observed when adapting to and discriminating different trustworthiness levels.
  • Enhanced sensitivity occurred regardless of gender or identity, suggesting selective mechanism enhancement.

Conclusions:

  • Facial trustworthiness adaptation selectively enhances perceptual sensitivity to trustworthiness.
  • Visual experience plays a role in judging the trustworthiness of others.