Oxytocin improves synchronisation in leader-follower interaction.

Area of Science:

• Neuroscience
• Social Psychology
• Behavioral Science

Background:

• Oxytocin is a neuropeptide known to influence social interaction.
• The precise mechanisms by which oxytocin affects social behavior are still under investigation.
• Interpersonal synchronisation is a key component of social interaction.

Purpose of the Study:

• To investigate if oxytocin administration influences the ability to synchronise with and adapt to another person's behavior.
• To explore the role of oxytocin in sensorimotor prediction during interpersonal coordination.

Main Methods:

• An interpersonal finger-tapping paradigm was employed.
• Participants were organized into dyads and received either intranasal oxytocin or a placebo.
• Tapping synchronisation and variability were measured under different conditions (leader-follower, metronome, mutual adaptation).

Main Results:

• Oxytocin administration significantly increased synchronisation in dyads where one member followed an unresponsive partner (leader/self-pacer).
• No significant effect of oxytocin was observed when following a metronome or during mutual adaptation.
• Oxytocin-treated followers exhibited reduced tapping variability compared to placebo followers when adapting to a self-paced partner.

Conclusions:

• Oxytocin enhances interpersonal synchronisation, particularly when adapting to an unresponsive partner, by reducing motor variability.
• The findings suggest oxytocin facilitates social interaction by improving sensorimotor predictions crucial for interpersonal synchronisation.
• This study provides insights into the neurobiological underpinnings of social cognition, highlighting the roles of synchronisation and prediction.