Age-varying effects of family, school, and peers on delinquency: A multilevel modeling test of interactional theory

Few criminologists have directly examined whether the importance of family, school, and peers in the etiology of delinquency changes over the developmental period of adolescence. This study tests hypotheses, derived from Thornberry's (1987) interactional theory, about the age-varying effects of attachment to parents, commitment to school, and association with delinquent peers on delinquency by applying Bryk and Raudenbush's (1992) hierarchical linear models to analyze the first five waves of data from the National Youth Survey. Results show that the direct as well as total effects of delinquent peers and school on delinquency tend to increase from early to middle adolescence, reach a peak at the age of mid-13 and mid-15, respectively, and then decline. This curvilinear pattern of change is interpreted as reflective of the process of adolescent development and the age-delinquency relationship. On the other hand, both direct and total effects of family on delinquency are found to be significant throughout the period of adolescence, but the effects do not systematically vary as hypothesized. Theoretical, methodological, and policy implications of the findings are also discussed.