How choice and motor mimicry affect affiliation: An fNIRS study

Area of Science:

• Neuroscience
• Social Psychology
• Cognitive Science

Background:

• Mimicry is thought to enhance social bonding, but its neural basis is not fully understood.
• It remains unclear if mimicking abstract choices or physical actions yields similar social effects.

Purpose of the Study:

• To investigate the neural mechanisms underlying affiliation and social bonding through choice versus motor mimicry.
• To compare the impact of choice mimicry and motor mimicry on social affiliation.

Main Methods:

• Used functional near-infrared spectroscopy (fNIRS) to measure brain activity in temporal and parietal regions.
• Examined participants (n=60) in two groups: Choice mimicry (selecting paintings) and Motor mimicry (performing hand movements).
• Assessed affiliation through various measures and correlated with brain activation patterns.

Main Results:

• Choice mimicry significantly increased affiliation and activated the bilateral inferior parietal lobule (IPL).
• Motor mimicry resulted in a subtle liking effect and activated the left posterior superior temporal sulcus (STS) and left temporo-parietal junction (TPJ).
• Awareness of the study's goal modulated activity in the right intraparietal sulcus (IPS) only in the Choice group.

Conclusions:

• Choice mimicry has a more potent effect on affiliation than motor mimicry.
• Differential neural pathways are involved in processing mimicked choices versus mimicked actions.
• Understanding these distinct neural mechanisms is crucial for comprehending social interaction and bonding.