Intra- and inter-brain synchrony oscillations underlying social adjustment

Area of Science:

• Neuroscience
• Cognitive Science
• Social Psychology

Background:

• Human behavior naturally synchronizes, but the underlying neural mechanisms of automatic behavioral adjustment and conformity remain unclear.
• Understanding these mechanisms is crucial for comprehending social interaction and coordination.

Purpose of the Study:

• To investigate the oscillatory synchronization mechanisms of automatic dyadic convergence using electroencephalography (EEG) hyperscanning.
• To explore the role of different brainwave frequencies (theta, alpha, beta) in interpersonal behavioral adjustment.

Main Methods:

• Thirty-six participants engaged in a cooperative decision-making task in dyads.
• EEG hyperscanning was employed to record brain activity.
• Inter-site phase clustering and Bayesian mixed-effects modeling analyzed neural connectivity in theta, alpha, and beta bands.

Main Results:

• Alpha oscillations were associated with attention and executive functions.
• Theta oscillations correlated with reinforcement learning processes.
• Beta oscillations were identified as the primary driver of inter-brain synchrony during the task.

Conclusions:

• The study provides preliminary evidence for phase-coherence mechanisms underlying interpersonal behavioral adjustment.
• Specific oscillatory dynamics in alpha, theta, and beta bands are linked to distinct aspects of social coordination and learning.