Compares the interactions of 20 firstborn and 17 lastborn children with their parents and siblings. Children were observed at home for five 45-minute sessions. Oldest children differed from youngest children in emitting more behaviors to parents than to siblings and in receiving more negative responses from parents and siblings. (Author/CB)

Mothers of 20 infants ranging in age from 14 to 16 months were asked to predict their infants' preferences within sets of toys varying in a single attribute. Their accuracy was checked by observing the infants at play. (Author/JMB)

Dynamic aspects of maternal language instruction and first language learning were explored by observing one- to five-year-old middle-class children with their mothers. (CM)

Observers coded the behavior of 40 middle-class, traditional couples and their 5-month-old infants, and parents filled out attitude questionnaires. Fathers' sex-role orientation and both parents' views concerning the role of the father were found to be correlated significantly with observed levels of paternal activity. (Author/CB)

Compared the home environments and parent-child interaction patterns of 20 preschool language-delayed children, 20 normal preschoolers and 20 genetically handicapped children with Down's Syndrome. Data indicate that language delay had a stronger influence on mother-child relationship than did socioeconomic factors. (Author/SDH)