Participants were asked how well a series of items described their externalizing behavior in the past six months on a three-point scale anchored 0 (not true) to 2 (very true or often true). Young adult prospective participants were administered the Adult Self-Report (ASR) form (Achenbach & Rescorla, 2001) and their adolescent counterparts were administered the Youth Self-Report (YSR) form (Achenbach, 2003). The YSR and ASR included 32 and 35 items, respectively, tapping rule-breaking, aggressive, and intrusive (ASR only) behavior. Sum scores were used.
