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Facial appearance influences trust decisions. Even subtle facial changes systematically alter perceptions and economic trust behaviors, showing similar strategies for judgments and actions.

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Area of Science:

  • Social Psychology
  • Behavioral Economics
  • Computer Vision

Background:

  • Facial appearance is rapidly assessed on social dimensions like trustworthiness, with high agreement among observers.
  • Previous research identified facial cues used in explicit trustworthiness judgments.
  • It was unclear if similar cues are used in implicit trust decisions.

Purpose of the Study:

  • To investigate whether perceptual strategies for explicit trustworthiness judgments are also used in implicit trust decisions.
  • To examine the influence of specific facial features on perceived trustworthiness and trust behaviors.

Main Methods:

  • Participants completed the Trust Game (economic decision task) while facial information was manipulated using the Bubbles method.
  • Facial features identified as diagnostic for trust were manipulated to test their influence on perceptions and behaviors (Experiments 2 & 3).

Main Results:

  • Economic trust decisions relied on similar visual facial information as explicit trustworthiness judgments.
  • Subtle, targeted changes to facial features systematically shifted both trustworthiness impressions and monetary trust decisions.
  • The same perceptual strategies underlie both explicit judgments and implicit trust behaviors.

Conclusions:

  • Facial appearance significantly influences trust decisions, demonstrating the applied relevance of even minimal facial alterations.
  • The findings highlight the consistency of perceptual strategies across explicit judgments and implicit trust behaviors.
  • Replication with diverse demographic groups is recommended to confirm generalizability.