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Human wagering behavior depends on opponents' faces.

Erik J Schlicht1, Shinsuke Shimojo, Colin F Camerer

  • 1Department of Psychology, Harvard University, Cambridge, Massachusetts, United States of America. schlicht@wjh.harvard.edu

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PubMed
Summary
This summary is machine-generated.

In competitive games, a trustworthy-looking opponent face, not a threatening one, significantly impacts wagering decisions. Players make more errors and take longer to decide when facing emotionally positive opponents.

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Area of Science:

  • Behavioral Economics
  • Game Theory
  • Social Psychology

Background:

  • Competitive game research typically focuses on opponent modeling via past outcomes and normative predictions.
  • The influence of rapid, subjective opponent impressions on economic decision-making remains under-explored, despite their impact on cooperation.

Purpose of the Study:

  • To investigate if an opponent's facial appearance influences players' wagering decisions in a zero-sum game with concealed information.
  • To determine the impact of subjective impressions derived from opponent faces on risky choices in a simplified poker task.

Main Methods:

  • Participants engaged in a simplified poker task involving risky wagering decisions.
  • Opponent faces were presented, varying in their correlation with subjective impressions of trustworthiness.
  • Reaction times and decision accuracy (percent correct) were recorded.

Main Results:

  • Threatening facial information had minimal influence on wagering behavior.
  • Faces conveying positive emotional characteristics significantly impacted decisions, leading to longer reaction times and increased errors.
  • Decision-making differences were most pronounced around the optimal decision boundary, suggesting face information is crucial for medium-value gambles.

Conclusions:

  • A "poker face" conveying trustworthiness, rather than neutrality, may be optimal for bluffing.
  • Rapid impressions derived from opponent faces play a significant role in competitive interactions, particularly with unfamiliar opponents.
  • Emotional cues from faces influence strategic decision-making in competitive economic contexts.