Analysis of mother-infant interaction in infants with down syndrome and typically developing infants.

Delays in development of early social behaviors in babies with Down syndrome are likely to affect patterns of interaction with their caregivers. We videotaped 23 babies in face-to-face interaction with their mothers at 8 and 20 weeks of age and compared them to 23 typically developing infants and their mothers. Social behaviors, mothers' behaviors, and quality of interaction were rated. At 8 weeks, babies with Down syndrome were significantly less communicative and lively than the typically developing babies. Their mothers' behaviors did not differ at 8 weeks, but did at 20 weeks. Although the social behaviors of babies with Down syndrome improved over time, qualitative differences remained.