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Updated: Feb 21, 2026

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Interbrain phase synchronization during turn-taking verbal interaction-a hyperscanning study using simultaneous

Sangtae Ahn1, Hohyun Cho2, Moonyoung Kwon3

  • 1Department of Psychiatry, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina.

Human Brain Mapping
|October 13, 2017
PubMed
Summary
This summary is machine-generated.

This study explored brain-to-brain communication during verbal interactions using hyperscanning. Researchers found significant neural synchronization between participants, advancing our understanding of social interaction mechanisms.

Keywords:
hyperscanningphase synchronizationsimultaneous EEG/MEGsocial interactionturn-taking verbal interaction

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Area of Science:

  • Neuroscience
  • Social Interaction Research
  • Brain-Computer Interface

Background:

  • Hyperscanning enables simultaneous measurement of multiple subjects' brain activity, revealing interbrain interactions.
  • Limited research exists on neural mechanisms underlying purely verbal social interactions without visual cues.

Purpose of the Study:

  • To investigate interbrain synchronization during turn-taking verbal communication using simultaneous electroencephalography (EEG) and magnetoencephalography (MEG).
  • To explore neural oscillations and phase synchronization in distinct brain regions during verbal interaction.

Main Methods:

  • Utilized two spatially separated EEG/MEG systems (19-channel EEG, 146-channel MEG) synchronized via network time protocol.
  • Ten subjects engaged in verbal interaction and non-interaction tasks, with brain activity recorded during communication.
  • Employed the weighted phase lag index to estimate phase synchronization between participant brains.

Main Results:

  • Observed significant oscillations in EEG alpha and MEG alpha/gamma bands across multiple brain regions in all subjects.
  • Demonstrated statistically significant phase synchronization between the brains of interacting participants in both EEG and MEG data.

Conclusions:

  • The developed hyperscanning paradigm effectively captures neural dynamics during verbal interaction.
  • Findings provide novel neurophysiological evidence of interbrain synchronization during purely verbal social exchanges.
  • This research contributes to a foundational understanding of the functional mechanisms governing human social interactions.