Journal
INFANT BEHAVIOR & DEVELOPMENT
Volume 34, Issue 4, Pages 569-577Publisher
ELSEVIER SCIENCE INC
DOI: 10.1016/j.infbeh.2011.06.008
Keywords
Mother-infant interaction; Heart rhythm; Biological synchrony; Evolutionary models; Interaction synchrony; Mammalian parenting
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Animal studies demonstrated the powerful impact of maternal-infant social contact on the infant's physiological systems, yet the online effects of social interactions on the human infant's physiology remain poorly understood. Mothers and their 3-month old infants were observed during face-to-face interactions while cardiac output was collected from mother and child. Micro-analysis of the partners' behavior marked episodes of gaze, affect, and vocal synchrony. Time-series analysis showed that mother and infant coordinate heart rhythms within lags of less than 1 s. Bootstrapping analysis indicated that the concordance between maternal and infant biological rhythms increased significantly during episodes of affect and vocal synchrony compared to non-synchronous moments. Humans, like other mammals, can impact the physiological processes of the attachment partner through the coordination of visuo-affective social signals. (C) 2011 Elsevier Inc. All rights reserved.
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