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Inter-brain synchrony and cooperation context in interactive decision making.

Yi Hu1, Yafeng Pan2, Xinwei Shi1

  • 1Shanghai Key Laboratory of Brain Functional Genomics, Key Laboratory of Brain Functional Genomics, Ministry of Education, School of Psychology and Cognitive Science, East China Normal University, Shanghai, China.

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|January 3, 2018
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Summary
This summary is machine-generated.

Brain synchrony increases with cooperation during human decision-making. This study used electroencephalography (EEG) hyperscanning to show that theta/alpha brainwave synchrony between partners reflects cooperative choices in interactive games.

Keywords:
CooperationEEGHyperscanningInter-brain synchronyInteractive decision making

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Area of Science:

  • Neuroscience
  • Social Psychology
  • Cognitive Science

Background:

  • Interactive decision-making involves observing others' behaviors.
  • Inter-brain synchrony occurs during social interactions, but its function is unclear.
  • Cooperation is a key aspect of social decision-making.

Purpose of the Study:

  • To investigate the functional meaning of inter-brain synchrony during interactive decision-making.
  • To examine the role of cooperation context in modulating inter-brain synchrony.
  • To explore the neural mechanisms underlying cooperative decision-making.

Main Methods:

  • Simultaneous electroencephalography (EEG) recording (hyperscanning) from 15 female dyads.
  • Participants played the Prisoner's Dilemma game under manipulated cooperation index (high vs. low) and partner type (human vs. machine) conditions.
  • Analysis of theta and alpha band inter-brain synchrony, cooperation rates, and subjective cooperativeness ratings.

Main Results:

  • Higher cooperation rates and inter-brain synchrony (theta/alpha bands) were observed when interacting with a human compared to a machine.
  • In human-human interactions, higher cooperation index led to increased centrofrontal theta and centroparietal alpha band synchrony.
  • Enhanced inter-brain synchrony correlated with increased cooperative choices, mediated by perceived cooperativeness.

Conclusions:

  • Cooperation plays a significant role in inter-brain synchrony during interactive decision-making.
  • Distinct neural processes related to cooperation enable sophisticated social cognitive processing.
  • Inter-brain synchrony may serve as a neural marker for cooperative decision-making in social contexts.