Pre-mobile infants and caregivers spontaneously engage in a sequence of contingent facial expressions and vocalizations that researchers have referred to as a social “dance.” Does this dance continue when both partners are free to move across the floor? Locomotor synchrony was assessed in 13- to 19-month-old infant–mother dyads (N = 30) by tracking each partner’s step-to-step location during free play. Although infants moved more than mothers, dyads spontaneously synchronized their locomotor activity. For 27 dyads, the spatiotemporal path of one partner uniquely identified the path of the other. Clustering analyses revealed two patterns of synchrony (mother-follow and yo-yo), and infants were more likely than mothers to lead the dance. Like face-to-face synchrony, locomotor synchrony scaffolds infants’ interactions with the outside world.

中文翻译：

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一起“跳舞”：婴儿-母亲的运动同步

活动前的婴儿和看护人自发地参与一系列偶然的面部表情和发声，研究人员将其称为社交“舞蹈”。当双方都可以在地板上自由移动时，这种舞蹈会继续吗？在 13 至 19 个月大的婴儿-母亲二人组中评估了运动同步性（N = 30) 通过在自由游戏期间跟踪每个伙伴的逐步位置。尽管婴儿比母亲移动得更多，但二元组自发地同步了他们的运动活动。对于 27 对，一个伙伴的时空路径唯一地标识了另一个伙伴的路径。聚类分析揭示了两种同步模式（母亲跟随和溜溜球），婴儿比母亲更有可能带领舞蹈。就像面对面的同步一样，运动同步为婴儿与外界的互动提供了支架。