“…Although peer relationships provide an essential context for adolescent social development, adolescents' conformity to negative peer norms appears as a major risk factor linked to negative outcomes ranging from delinquency and substance abuse to risky sexual behavior (DiIorio et al, 2001;Hops, Andrews, Duncan, Duncan, & Tildesley, 2000;Prinstein, Boergers, & Spirito, 2001;Urberg, Degirmencioglu, & Pilgrim, 1997). Beyond adolescence, problems in relating to peers have been linked to a range of outcomes including depression, conflictual marital relationships, and even an increased likelihood of early death (Klerman, Weissman, Rounsaville, & Chevron, 1984;Miller, Smith, Turner, Guijarro, & Hallet, 1996).…”