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Inter-group conflict affects inter-brain synchrony during synchronized movements.

H Nathan Gamliel1, M Nevat1, H Z Gvirts Probolovski2

  • 1Department of Psychology, University of Haifa, Haifa, Israel.

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This summary is machine-generated.

Interpersonal synchrony, or brain-to-brain synchrony (IBS), was higher in same-nationality dyads than in Jewish-Palestinian dyads. This suggests group membership influences neural alignment during interaction.

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Area of Science:

  • Neuroscience
  • Social Psychology
  • Cognitive Science

Background:

  • Interpersonal synchrony, the temporal alignment of interacting individuals, is increasingly linked to the inferior frontal gyrus (IFG).
  • The IFG's role in observation-execution systems suggests its involvement in mediating interpersonal synchrony.
  • However, the influence of inter-group relationships on neural synchrony remains underexplored.

Purpose of the Study:

  • To investigate whether inter-brain synchrony (IBS) is modulated by inter-group relationships.
  • To examine IBS in the context of the Israeli-Palestinian conflict.
  • To explore the plasticity of IBS in relation to group membership.

Main Methods:

  • Functional Near Infra-Red Spectroscopy (fNIRS) hyperscanning was employed to measure IBS.
  • Dyads performed a 2D movement synchrony task.
  • Participants were either same-nationality (ingroup) or Jewish-Palestinian (inter-group).

Main Results:

  • Ingroup dyads exhibited greater behavioral synchrony and enjoyment compared to inter-group dyads.
  • Inter-brain synchrony (IBS) in the left inferior frontal gyrus (IFG) increased during the task.
  • IBS in the left IFG was significantly higher in ingroup dyads than in inter-group dyads.

Conclusions:

  • Group membership significantly modulates inter-brain synchrony (IBS) plasticity.
  • The findings highlight the impact of inter-group dynamics on neural synchrony.
  • The left IFG plays a crucial role in mediating interpersonal synchrony, influenced by group affiliation.