Discriminative Infant Smiling to Orientations of Talking Faces of Mother and Stranger
Thirty-two infants aged 14 and 20 weeks were presented with a live face in each of eight conditions, which consisted of all combinations of (a) a 0° or 90° orientation; (b) familiar face (the infant's mother) or distinctively unfamiliar face; and (c) talking or silent context. The previous findings that younger infants smile longer at 0° than at 90° faces and that this differential responsiveness to orientation wanes with increasing age were replicated; the hypothesis that older infants would smile longest at their mothers' talking faces in the 0° orientation was confirmed. In addition, infants of both ages smiled more at their mothers than at the stranger, although this effect interacted with orientation and sex of the infant.
MSU Digital Commons Citation
Watson, John S.; Hayes, Louise A.; Vietze, Peter; and Becker, Jacqueline, "Discriminative Infant Smiling to Orientations of Talking Faces of Mother and Stranger" (1979). Department of Psychology Faculty Scholarship and Creative Works. 177.