A perturbation paradigm was employed to assess 3- and 6-month-old infants' and their mothers' sensitivity to a 3-s temporal delay implemented in an ongoing televised interaction. At both ages, the temporal delay affected infant but not maternal behavior and only when implementing the temporal delay in maternal (Experiment 1, N = 64) but not infant…

Examines how certain human brow and mouth gestures influence the attributions of social dominance made by children. Hypothesizes that stimulus photographs depicting adults with lowered-brow expressions or without smiles appear to be more dominant relative to photographs showing adults with raised-brow expressions or with smiles, respectively. (HOD)

Examines whether three-month-old infants can detect variations within the single expression category of smiling and whether individual differences in infants' sensitivities are related to identifiable mother or infant behaviors. (HOD)