Investigated through direct observation in the home whether mothers socialize differently boys and girls growing up as opposite-sexed twins, triplets, and quadruplets as a function of their different genders. Children and mothers were rated on behaviors about which contradictory evidence had been reported in the literature. (Author/DB)

Assessments of parent and sibling attachments were made when the firstborn child of a two-child family was one, three, and six years old. Sibling conflict and aggression were related to maternal conflict with both children at six years. Affectionate fathering was associated with prosocial sibling interaction. (BC)

Preschool children's security of attachment was assessed in the laboratory, and their interactions with peers were observed in the preschool. Insecure boys showed more aggressive, disruptive, assertive, and controlling behavior than secure children. Insecure girls showed more dependent and compliant behavior, and less assertive and controlling…