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Related Experiment Video

Updated: Jul 11, 2025

Inter-Brain Synchrony in Open-Ended Collaborative Learning: An fNIRS-Hyperscanning Study
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Interpersonal neural synchronization underlies mnemonic similarity during collaborative remembering.

Huan Zhang1, Haiman Wang2, Yuhang Long3

  • 1Key Research Base of Humanities and Social Sciences of the Ministry of Education, Academy of Psychology and Behavior, Tianjin Normal University, Tianjin, 300387, China; Faculty of Psychology, Tianjin Normal University, Tianjin, 300387, China; Tianjin Social Science Laboratory of Students' Mental Development and Learning, Tianjin, 300387, China.

Neuropsychologia
|November 11, 2023
PubMed
Summary

Real collaboration enhances interpersonal neural synchronization (INS) in the prefrontal cortex (PFC), leading to improved memory recall. This neural synchrony is key to understanding how people remember together effectively.

Keywords:
Collaborative rememberingGroup-based selective retrieval practiceInterpersonal neural synchronizationMnemonic similarityfNIRS

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Area of Science:

  • Cognitive Neuroscience
  • Social Psychology
  • Neuroimaging

Background:

  • Collaborative remembering is common, but its neural basis is unclear.
  • Interpersonal neural synchronization (INS) is a potential mechanism.
  • Real-time collaboration may uniquely boost INS and memory.

Purpose of the Study:

  • To investigate the role of INS in collaborative remembering.
  • To compare neural activity during real versus pseudo-collaboration.
  • To determine if INS facilitates mnemonic similarity.

Main Methods:

  • Simultaneous electroencephalography (EEG) recording from pairs of participants.
  • Group-based selective retrieval practice task in real and pseudo-collaboration conditions.
  • Analysis of brain activity, focusing on prefrontal cortex (PFC) synchronization.

Main Results:

  • Memory convergence significantly exceeded chance in real collaboration, not pseudo-collaboration.
  • Real collaboration showed increased INS in the PFC compared to baseline.
  • PFC INS increase was greater in real collaboration and positively correlated with memory similarity.

Conclusions:

  • Enhanced interpersonal neural synchronization in the PFC underlies collaborative remembering.
  • Real-time interaction is crucial for boosting neural synchrony during memory tasks.
  • INS predicts the degree of shared memory between collaborators.