Leader–follower behavioural coordination and neural synchronization during intergroup conflict

Hejing Zhang, Jiaxin Yang, Jun Ni, Carsten K. W. Dreu and Yina Ma ()
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Hejing Zhang: Beijing Normal University
Jiaxin Yang: Beijing Normal University
Jun Ni: Beijing Normal University
Carsten K. W. Dreu: Leiden University
Yina Ma: Beijing Normal University

Nature Human Behaviour, 2023, vol. 7, issue 12, 2169-2181

Abstract: Abstract Leaders can launch hostile attacks on out-groups and organize in-group defence. Whether groups settle the conflict in their favour depends, however, on whether followers align with leader’s initiatives. Yet how leader and followers coordinate during intergroup conflict remains unknown. Participants in small groups elected a leader and made costly contributions to intergroup conflict while dorsolateral prefrontal cortex (DLPFC) activity was simultaneously measured. Leaders were more sacrificial and their contribution influenced group survival to a greater extent during in-group defence than during out-group attacks. Leaders also had increased DLPFC activity when defending in-group, which predicted their comparatively strong contribution to conflict; followers reciprocated their leader’s initiatives the more their DLPFC activity synchronized with that of their leader. When launching attacks, however, leaders and followers aligned poorly at behavioural and neural levels, which explained why out-group attacks often failed. Our results provide a neurobehavioural account of leader–follower coordination during intergroup conflict and reveal leader–follower behavioural/neural alignment as pivotal for groups settling conflicts in their favour.

Date: 2023
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DOI: 10.1038/s41562-023-01663-0

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