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Related Experiment Videos

Facial resemblance enhances trust.

Lisa M DeBruine1

  • 1Department of Psychology, McMaster University, Hamilton, Ontario, Canada L8S 4K1. debruilm@mcmaster.ca

Proceedings. Biological Sciences
|June 25, 2002
PubMed
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Facial resemblance influences trust. People are more likely to trust partners who look like them, but this does not affect selfish behavior. Resemblance to famous faces had no impact on trust or betrayal.

Area of Science:

  • Evolutionary Psychology
  • Behavioral Economics
  • Social Neuroscience

Background:

  • Social behavior is influenced by perceived genetic relatedness.
  • Phenotype matching, using traits like facial resemblance, is a mechanism for assessing relatedness.
  • Facial similarity may play a role in human social decision-making.

Purpose of the Study:

  • To investigate the effect of experimentally manipulated facial resemblance on trust and betrayal in a social game.
  • To determine if self-resemblance influences trusting behavior differently from betrayal.
  • To examine the impact of resemblance to familiar (famous) individuals on social behavior.

Main Methods:

  • A two-person sequential trust game was employed.
  • Participants played with computer-generated faces manipulated to resemble themselves or an unknown person.

Related Experiment Videos

  • Control groups played with identical pictures or faces resembling famous individuals.

    • Main Results:

    • Facial resemblance to the subject increased the likelihood of trusting a partner.
    • Self-resemblance did not affect the incidence of selfish betrayals.
    • Resemblance to a famous person had no significant effect on trusting or betrayal.

    Conclusions:

    • Facial resemblance serves as a cue for promoting trust in social interactions.
    • The effect of facial resemblance on trust is specific and does not extend to preventing selfish betrayal.
    • Social decision-making is sensitive to cues of genetic relatedness, particularly self-resemblance.