“…Evidence suggests a link between childhood aggression, drug use, and later delinquency mediated by early conduct disorder (Brook, Whiteman, Finch, & Cohen, 1995Dobkin, Tremblay, Masse, & Vitaro, 1995 ;Hawkins, Catalano, & Miller, 1992 ;Kellam, Brown, Rubin, & Ensminger, 1983 ;Robins & McEvoy, 1990 ;Robins & Wish, 1977 ;Stacy & Newcombe, 1995). In keeping with this, longitudinal studies (conducted in the 1980s) reported childhood personality attributes such as aggression, a '' difficult '' temperament, rebelliousness, impulsivity, mood disturbances, and interpersonal difficulties to be related to later drug use (Block, Block, & Keyes, 1988 ; J.…”