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Related Experiment Video

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Interpersonal brain synchronization under bluffing in strategic games.

Zhihao Wang1, Yiwen Wang2,3, Xiaolin Zhou4,5,6,7,8

  • 1School of Psychology, Center for Studies of Psychological Application and Key Laboratory of Mental Health and Cognitive Science of Guangdong Province, South China Normal University, Guangzhou, China.

Social Cognitive and Affective Neuroscience
|November 13, 2020
PubMed
Summary
This summary is machine-generated.

Bluffing involves manipulating beliefs for gain. This study found that higher penalties increase bluffing and brain synchronization in the right angular gyrus during human interactions, especially when mentalizing regions synchronize.

Keywords:
bluffingfNIRS hyperscanningmentalizingrAG

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Area of Science:

  • Neuroscience
  • Social Psychology
  • Game Theory

Background:

  • Bluffing is a key strategic behavior for manipulating others' beliefs.
  • The neural underpinnings of bluffing, particularly interpersonal brain mechanisms, are not well understood.

Purpose of the Study:

  • To investigate the inter-brain synchronization (IBS) during a bluffing game.
  • To examine how penalties and opponent type (human vs. computer) influence bluffing behavior and neural activity.

Main Methods:

  • Utilized functional near-infrared spectroscopy (fNIRS) hyperscanning to record brain activity in 32 pairs of participants.
  • Participants played a bluffing game against each other or computer opponents under high and low bluffing penalty conditions.
  • Focused on brain activity in the right temporal-parietal junction, specifically the right angular gyrus (rAG).

Main Results:

  • Higher bluffing and calling rates were observed in human-to-human interactions compared to human-to-computer interactions, especially under high penalties.
  • Increased interpersonal brain synchronization (IBS) in the right angular gyrus (rAG) was found under high penalties and human-to-human conditions.
  • Bluffing, particularly under high penalties and human-to-human interaction, led to increased response times and enhanced IBS in the rAG. Higher frequency of bluffing correlated with stronger IBS.

Conclusions:

  • Mentalizing regions, specifically the rAG, synchronize during bluffing games.
  • Interpersonal brain synchronization is heightened in human-to-human bluffing, particularly with higher stakes.
  • Neural synchronization in mentalizing areas plays a crucial role in strategic social interactions like bluffing.