Abstract
Drawing on relevant theory and research, it is argued that the impact of delinquent peers on delinquency is conditioned by (1) attachment to peers, (2) time spent with peers, and (3) the extent to which peers present delinquent patterns (i.e., present definitions favorable to delinquency, model delinquent behavior, and differentially rein force delinquency). Regression analyses with data from the National Youth Survey provide partial support for these arguments. When the above variables are at their mean or lower levels, a measure of association with peers who engage in serious delinquency has no impact or a negative impact on delinquency. When the above variables are at higher levels, delinquent peers (serious) has a strong, positive impact on delinquency. A measure of association with peers who engage in minor delinquency, however, is not conditioned by the above variables.