Families by Adoption and Birth: II. Mother-Infant Cognitive Interactions.

Adopted children are more likely to develop learning and school adjustment problems than are their non-adopted peers, despite the fact that learning potential appears to be comparable in the two groups. In an effort to explain this phenomenon, the present study examined cognitive behavior repertoires in healthy 5-month-old first infants and their mothers during their normal daily routine in families by adoption and by birth. Two areas of functioning, vocal/verbal communication and exploration, were examined. Infants and mothers in both groups were similar in the frequency and ranking of a full array of age-appropriate cognitive behaviors. Both groups of babies experienced rich and comparable opportunities for the development of language competence. In the exploratory realm, group differences emerged for some infant measures; infants by birth were in an alert state and mouthed objects more than infants by adoption. Examination of the linkages among infant behaviors and between mothers and infants suggested that, while mothers by birth and adoption provided comparable opportunities for exploration, infants by birth were engaging in exploratory behavior to a somewhat greater extent.