Inter-Brain Synchronization during Social Interaction

During social interaction, both participants are continuously active, each modifying their own actions in response to the continuously changing actions of the partner. This continuous mutual adaptation results in interactional synchrony to which both members contribute. Freely exchanging the role of...

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Veröffentlicht in:PloS one Jg. 5; H. 8; S. e12166
Hauptverfasser: Dumas, Guillaume, Nadel, Jacqueline, Soussignan, Robert, Martinerie, Jacques, Garnero, Line
Format: Journal Article
Sprache:Englisch
Veröffentlicht: United States Public Library of Science 17.08.2010
Public Library of Science (PLoS)
Schlagworte:
Adaptations
Behavior
Behavior - physiology
Brain
Brain - physiology
Brain activity
Brain research
Communication
Decision making
EEG
Electroencephalography
Female
Frequencies
Hand movements
Humans
Imitation
Imitative Behavior
Imitative Behavior - physiology
Interpersonal Relations
Life Sciences
Male
Neural networks
Neurons and Cognition
Neuroscience/Behavioral Neuroscience
Neuroscience/Cognitive Neuroscience
Neuroscience/Motor Systems
Neuroscience/Psychology
Neuroscience/Sensory Systems
Regions
Social behavior
Social interaction
Synchronism
Synchronization
Synchrony
Trends
Turn taking
Young Adult
France
ISSN:1932-6203, 1932-6203
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Zusammenfassung:During social interaction, both participants are continuously active, each modifying their own actions in response to the continuously changing actions of the partner. This continuous mutual adaptation results in interactional synchrony to which both members contribute. Freely exchanging the role of imitator and model is a well-framed example of interactional synchrony resulting from a mutual behavioral negotiation. How the participants' brain activity underlies this process is currently a question that hyperscanning recordings allow us to explore. In particular, it remains largely unknown to what extent oscillatory synchronization could emerge between two brains during social interaction. To explore this issue, 18 participants paired as 9 dyads were recorded with dual-video and dual-EEG setups while they were engaged in spontaneous imitation of hand movements. We measured interactional synchrony and the turn-taking between model and imitator. We discovered by the use of nonlinear techniques that states of interactional synchrony correlate with the emergence of an interbrain synchronizing network in the alpha-mu band between the right centroparietal regions. These regions have been suggested to play a pivotal role in social interaction. Here, they acted symmetrically as key functional hubs in the interindividual brainweb. Additionally, neural synchronization became asymmetrical in the higher frequency bands possibly reflecting a top-down modulation of the roles of model and imitator in the ongoing interaction.
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Conceived and designed the experiments: GD JN RS JM LG. Performed the experiments: GD JN JM LG. Analyzed the data: GD RS JM. Wrote the paper: GD JN RS JM LG.
ISSN:1932-6203
1932-6203
DOI:10.1371/journal.pone.0012166