Research Findings: Studies of children's prosocial behavior typically focus on prosocial acts with a specific partner (e.g., a friend, peer, or sibling), and comparisons of prosociality in different contexts are rare. To address this gap, the current study examined predictive links among children's spontaneous sharing (a common and important form…

Research Findings: Sibling teaching and learning behaviors were investigated in 2 studies of children in early and middle childhood. Study 1 addressed individual differences in teaching/learning and associations with dyadic age, age gap, gender, birth order, and relationship quality in 71 middle-class dyads (firstborns M age = 81.54 months;…

As part of a longitudinal study examining sibling and friend relationships in early and middle childhood, relational aggression by 4-year-olds and their interaction partners in semi-structured free play sessions with siblings and friends was examined during sibling sessions involving both same-gender and mixed-gender sibling pairs. Identifiable…