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Related Experiment Video

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Brain Imaging Investigation of the Neural Correlates of Observing Virtual Social Interactions
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Informal Face-to-Face Interaction Improves Mood State Reflected in Prefrontal Cortex Activity.

Jun-Ichiro Watanabe1, Hirokazu Atsumori1, Masashi Kiguchi1

  • 1Research and Development Group, Hitachi, Ltd. Tokyo, Japan.

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|May 21, 2016
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Summary

Informal face-to-face interactions during work breaks boost employee mood and performance. This study shows social breaks improve mood state, enhancing task performance, unlike solitary breaks which decrease it.

Keywords:
face-to-face interactionmood statenear-infrared spectroscopy (NIRS)prefrontal cortexworking memory

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Area of Science:

  • Organizational Psychology
  • Neuroscience
  • Human-Computer Interaction

Background:

  • Wearable sensors enable quantitative analysis of face-to-face interactions.
  • Previous studies link informal employee interactions to organizational productivity.
  • The underlying mechanism connecting interaction, mood, and performance remains unclear.

Purpose of the Study:

  • To investigate the hypothesis that informal face-to-face interaction improves mood state, thereby affecting task performance.
  • To quantitatively assess the impact of social interaction during breaks on mood and cognitive function.
  • To explore the neurophysiological correlates of mood changes during social interaction.

Main Methods:

  • Two groups of participants were observed: one interacting socially during breaks, the other alone.
  • Mood state was assessed using questionnaires (Profiles of Mood States - POMS) and brain activity measurements (near-infrared spectroscopy - NIRS).
  • Verbal working memory (WM) task performance was evaluated before and after break periods.

Main Results:

  • Face-to-face interaction during breaks significantly improved participants' mood state.
  • Participants who spent breaks alone showed a significant decrease in verbal working memory task performance.
  • Prefrontal cortex (PFC) activity, measured by NIRS, correlated with mood changes and WM task performance.

Conclusions:

  • Informal face-to-face interaction during breaks positively influences mood state.
  • Improved mood state is a likely mediator between social interaction and enhanced task performance.
  • Neuroimaging provides evidence for the link between social interaction, mood regulation, and cognitive function in the workplace.