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When do we fall in neural synchrony with others?

Kelong Lu1, Ning Hao1

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

Social Cognitive and Affective Neuroscience
|February 13, 2019
PubMed
Summary

Interpersonal brain synchronization (IBS) occurs during collaboration. Real participants showed increased IBS and cooperation over time, unlike interactions with a confederate, indicating synchronized brains enhance teamwork.

Keywords:
Interpersonal interactionfNIRShyperscanninginterpersonal brain synchronization

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Area of Science:

  • Neuroscience
  • Cognitive Science
  • Social Psychology

Background:

  • Interpersonal brain synchronization (IBS) is a neural correlate of social interaction.
  • Understanding the dynamics of IBS during collaborative tasks is crucial for social neuroscience.
  • Previous research has limitations in studying IBS in naturalistic collaborative settings.

Purpose of the Study:

  • To investigate the occurrence and temporal trajectory of IBS during a collaborative task.
  • To develop and utilize a novel functional near-infrared spectroscopy (fNIRS)-based hyperscanning paradigm.
  • To compare IBS patterns between real participant dyads and dyads involving a confederate.

Main Methods:

  • Employed a novel fNIRS-hyperscanning setup to measure brain activity in multiple participants simultaneously.
  • Designed a collaborative task involving three-person groups with two real participants and one confederate.
  • Quantified cooperation behavior and analyzed IBS in the bilateral dorsolateral prefrontal cortex.

Main Results:

  • Real participant pairings exhibited significantly greater cooperation behavior and IBS compared to pairings with a confederate.
  • IBS and cooperation levels increased over time in dyads of real participants.
  • Dyads involving a confederate showed consistently low and stable levels of IBS and cooperation.

Conclusions:

  • IBS is a key phenomenon during collaborative tasks, particularly between individuals genuinely interacting.
  • Both IBS and cooperative behavior demonstrate a tendency to increase over time in real collaborative dyads.
  • The findings highlight the link between neural synchrony and effective interpersonal collaboration.