Abstract
Attention-deficit hyperactivity disorder (ADHD) (American Psychiatric Association, 1994) refers to children, adolescents, and adults who demonstrate a pattern of deficits in behavioral control and self-regulation comprising poor sustained attention, impulsivity, and hyperactivity (Barkley, 1990). This pattern of behavior commonly arises during the preschool or early childhood years, is significantly inappropriate for the child’s developmental level, is relatively stable, and persists into adolescence in more than half of all cases diagnosed in childhood (Barkley, 1990; Barkley, Fischer, Edelbrock, & Smallish, 1990). As many as 30% to 60% of childhood cases may continue to have the disorder into their young adult years (Gittelman, Mannuzza, Shenker, & Bonagura, 1985; Weiss & Hechtman, 1986).
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