Sibling relationship quality: its causes and consequences.

Current work on children's individual characteristics and family processes that contribute to variation in sibling relationship quality is reviewed. Findings from these studies are summarized in a heuristic model that specifies hypothesized links among family processes, intrapersonal characteristics, and variations in sibling relationship quality. The model is designed to provide researchers with a host of hypotheses to test and refine in future studies. The contributions that sibling relationships may make to cognitive and psychosocial development are then reviewed, with a suggestion that sibling relationships comprised of a balance of both prosocial and conflicted interactions create experiences that are most likely to nurture children's social, cognitive, and psychosocial development.