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Reduced self-referential neural response during intergroup competition predicts competitor harm.

M Cikara1, A C Jenkins2, N Dufour3

  • 1Carnegie Mellon University, USA.

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Summary
This summary is machine-generated.

Group competition reduces self-referential moral processing, increasing willingness to harm out-groups. This shift from "me vs. you" to "us vs. them" dynamics explains increased hostility in intergroup contexts.

Keywords:
Intergroup competitionMedial prefrontal cortexSelfSocial cognitionfMRI

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Area of Science:

  • Social neuroscience
  • Moral psychology

Background:

  • Intergroup competition often escalates hostility compared to interpersonal competition.
  • Reduced self-referential processing may facilitate harmful actions towards out-group members.

Purpose of the Study:

  • To investigate if group competition decreases self-referential processing in the moral domain.
  • To examine the link between reduced self-referential processing and willingness to harm competitors.

Main Methods:

  • Functional magnetic resonance imaging (fMRI) was used to measure brain activity.
  • Participants competed alone and in a group, with self-referential processing indexed by medial prefrontal cortex (mPFC) activation.
  • Willingness to harm competitors and teammates was assessed.

Main Results:

  • Reduced mPFC activation during group competition correlated with increased willingness to harm competitors.
  • Intergroup competition, more than interpersonal competition, reduced spontaneous self-referential processing.

Conclusions:

  • Group dynamics can diminish self-referential moral cognition.
  • This reduction in self-awareness during intergroup conflict enables greater harm towards out-group individuals.