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Related Experiment Video

Updated: Aug 31, 2025

Group Synchronization During Collaborative Drawing Using Functional Near-Infrared Spectroscopy
07:53

Group Synchronization During Collaborative Drawing Using Functional Near-Infrared Spectroscopy

Published on: August 5, 2022

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Group Synchronization during Collaborative Drawing using Functional Near-Infrared Spectroscopy.

Valéria Gonçalves da Cruz Monteiro1, Jade Antunes Nascimento2, Paulo Rodrigo Bazán2

  • 1Hospital Israelita Albert Einstein (HIAE); 7valmonte7@gmail.com.

Journal of Visualized Experiments : Jove
|August 22, 2022
PubMed
Summary

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This study introduces a practical protocol using functional near-infrared spectroscopy (fNIRS) to measure brain activity and behavior in groups. It enables the study of interpersonal synchronization during cooperative tasks in naturalistic settings.

Area of Science:

  • Neuroscience
  • Cognitive Science
  • Social Interaction Research

Background:

  • Functional near-infrared spectroscopy (fNIRS) is a noninvasive brain imaging technique.
  • Studying group interactions requires methods to monitor multiple individuals simultaneously.
  • Existing fNIRS setups and paradigms for group studies need practical implementation guidance.

Purpose of the Study:

  • To present a protocol for measuring interpersonal synchronization in groups using fNIRS and video observation.
  • To provide practical recommendations for data acquisition and experimental design in group fNIRS studies.
  • To assess brain and behavioral responses during social versus non-social conditions in a cooperative task.

Main Methods:

  • Combined fNIRS and video-based observation to monitor quartets.

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Last Updated: Aug 31, 2025

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  • Utilized a cooperative task inspired by the Collaborative Face Drawing Task.
  • Compared social and non-social conditions to analyze interpersonal responses.

    • Main Results:

    • The protocol successfully measured hemodynamic and behavioral responses in group interactions.
    • Demonstrated differences in brain and behavioral interpersonal responses between social and non-social conditions.
    • Provided a framework for analyzing synchronized group activity using fNIRS.

    Conclusions:

    • The developed protocol facilitates the study of naturalistic group social interactions using fNIRS.
    • This method is valuable for understanding interpersonal synchronization and group dynamics.
    • Future research can adapt this protocol for various group-based ecological studies.