Articles Childhood hyperactivity, ADHD, and Conduct Disorder are

risks for a host of psychosocial difficulties in later life, including persisting hyperactivity, comorbid psychopathol-ogy, antisocial behavior, substance misuse, and social and peer relationship problems (Barkley, Fischer, Edelbrock, & Smallish, 1990; Klein & Mannuzza, 1991; Taylor, Chadwick, Heptinstall, & Danckaerts, 1996). Hyperactivity is a term for an enduring disposition to behave in a restless, inatten-tive, and impulsive manner. This can exist on a continuous scale, from mild hyperactivity, which may not impede on productivity or interpersonal relationships, to the levels associated with the diagnostic criteria for ADHD. Most follow-up studies have largely consisted of male samples; however, a follow-up of undiagnosed females into adoles-cence suggested that girls ’ pattern of functioning may differ from that of boys because girls self-report a more pervasiv