Examines the capability and motivation of 18- and 24-month-old infants to share, help, comfort, and cooperate with their older siblings; the frequency of such prosocial behavior by both siblings; and the children's response to sibling distress. The relationship between prosocial and conflict behavior was also studied. (HOD)

Observes parents' socialization practices in 24 homes of families with first-born infants at 11, 14, and 17 months of age. Four kinds of socializing practices were observed and compared by parents' sex, infants' age, and infants' sex. (HOD)

Using a longitudinal design, investigates the interactive behaviors of mothers of normal infants and mothers of infants who are known to differ on a host of cognitive, behavioral, and biological parameters. Examines the developmental course of emotional expressivity in these infants. (HOD)

Suggests that play begins with infant-adult interaction soon after birth rather than with much later peer interactions. Proposes a developmental sequence of infant play that reverses the sequences of the Howes peer play scale, and cites pertinent literature to support that proposal. (BC)

Recent research about children's early personal-social learning and development is reviewed in relation to three basic psychological questions. The first concerns extent of stability or consistency in stylistic patterns of personal-social behavior across infancy, the preschool years, and the early school years. The second concerns current…