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Two is better than one: The effects of strategic cooperation on intra- and inter-brain connectivity by fNIRS

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  • Michela Balconi
  • Laurent Pezard
  • Jean-Louis Nandrino
  • Maria Elide Vanutelli

Abstract

Inter-brain synchronization during joint actions is a core question in social neuroscience, and the differential contribution of intra- and inter-brain functional connectivity has yet to be clarified along with the role of psychological variables such as perceived self-efficacy. The cognitive performance and the neural activation underlying the execution of joint actions were recorded by functional Near-Infrared imaging during a synchronicity game. An 8-channel array of optodes was positioned over the frontal and prefrontal regions. During the task, the dyads received reinforcing feedback that was experimentally manipulated to induce adoption of common strategies. Intra- and inter-brain connectivity indices were computed along with an inter-brain/intra-brain connectivity index (ConIndex). Finally, correlation analyses were run to assess the relationship between behavioral and physiological levels. The results showed that the external feedback could modulate participant responses in both behavioral and neural components. After the reinforcing manipulation, there were faster response times and increased inter-brain connectivity, and ConIndex emerged primarily over the dorsolateral prefrontal cortex. Additionally, the presence of significant correlations between response times and inter-brain connectivity revealed that only the “two-players connection” may guarantee an efficient performance. The present study provides a significant contribution to the identification of intra- and inter-brain functional connectivity when social reinforcement is provided.

Suggested Citation

  • Michela Balconi & Laurent Pezard & Jean-Louis Nandrino & Maria Elide Vanutelli, 2017. "Two is better than one: The effects of strategic cooperation on intra- and inter-brain connectivity by fNIRS," PLOS ONE, Public Library of Science, vol. 12(11), pages 1-17, November.
    • Handle: RePEc:plo:pone00:0187652
    DOI: 10.1371/journal.pone.0187652
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    References listed on IDEAS

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    1. Yulia Golland & Yossi Arzouan & Nava Levit-Binnun, 2015. "The Mere Co-Presence: Synchronization of Autonomic Signals and Emotional Responses across Co-Present Individuals Not Engaged in Direct Interaction," PLOS ONE, Public Library of Science, vol. 10(5), pages 1-13, May.
    2. Fabrizio De Vico Fallani & Vincenzo Nicosia & Roberta Sinatra & Laura Astolfi & Febo Cincotti & Donatella Mattia & Christopher Wilke & Alex Doud & Vito Latora & Bin He & Fabio Babiloni, 2010. "Defecting or Not Defecting: How to “Read” Human Behavior during Cooperative Games by EEG Measurements," PLOS ONE, Public Library of Science, vol. 5(12), pages 1-9, December.
    3. Monterosso, John & Ainslie, George & Pamela Toppi Mullen, P. A. -C. & Gault, Barbara, 2002. "The fragility of cooperation: A false feedback study of a sequential iterated prisoner's dilemma," Journal of Economic Psychology, Elsevier, vol. 23(4), pages 437-448, August.
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