Zamm Anna, Wellman Chelsea, Palmer Caroline
Department of Psychology, McGill University.
J Exp Psychol Hum Percept Perform. 2016 May;42(5):611-6. doi: 10.1037/xhp0000201. Epub 2016 Jan 28.
Interpersonal synchrony, the temporal coordination of actions between individuals, is fundamental to social behaviors from conversational speech to dance and music-making. Animal models indicate constraints on synchrony that arise from endogenous rhythms: Intrinsic periodic behaviors or processes that continue in the absence of change in external stimulus conditions. We report evidence for a direct causal link between endogenous rhythms and interpersonal synchrony in a music performance task, which places high demands on temporal coordination. We first establish that endogenous rhythms, measured by spontaneous rates of individual performance, are stable within individuals across stimulus materials, limb movements, and time points. We then test a causal link between endogenous rhythms and interpersonal synchrony by pairing each musician with a partner who is either matched or mismatched in spontaneous rate and by measuring their joint behavior up to 1 year later. Partners performed melodies together, using either the same or different hands. Partners who were matched for spontaneous rate showed greater interpersonal synchrony in joint performance than mismatched partners, regardless of hand used. Endogenous rhythms offer potential to predict optimal group membership in joint behaviors that require temporal coordination.
人际同步，即个体之间行动的时间协调，对于从对话发言到舞蹈和音乐创作等社会行为至关重要。动物模型表明内源性节律对同步存在限制：内源性节律是指在外部刺激条件不变的情况下仍持续的内在周期性行为或过程。我们报告了在一项对时间协调要求很高的音乐表演任务中，内源性节律与人际同步之间存在直接因果关系的证据。我们首先确定，通过个体表演的自发速率测量的内源性节律，在个体内部跨越刺激材料、肢体动作和时间点都是稳定的。然后，我们通过将每位音乐家与一位自发速率匹配或不匹配的搭档配对，并在长达1年后测量他们的联合行为，来测试内源性节律与人际同步之间的因果关系。搭档们一起演奏旋律，使用相同或不同的手。无论使用哪只手，自发速率匹配的搭档在联合表演中表现出的人际同步性都比不匹配的搭档更强。内源性节律为预测需要时间协调的联合行为中的最佳群体成员提供了可能性。
