“…In approximately two-thirds (50-70%) of individuals diagnosed with ADHD, there is corollary evidence of clinical problems related to learning ability (Barry, Lyman, & Klinger, 2002;Mayes, Calhoun, & Crowell, 2000;Willcutt, Pennington, Olson, Chhabildas, & Hulslander, 2005), social adjustment and functioning (Carlson, Lahey, Frame, Walker, & Hynd, 1987;Pfiffner, Calzada, & McBurnett, 2000), or emotional well-being (Abikoff & Klein, 1992;Accardo, Blondis, & Whitman, 1990;Jensen, Martin, & Cantwell, 1997;Shaywitz & Shaywitz, 1991). For some, these clinical issues, rather than attentional deficits or hyperactivity, initiate referral of children who will eventually be diagnosed with ADHD (Mulhern, Dworkin, & Bernstein, 1994;Weinberg & Emslie, 1991;Wilens et al, 2002). The presence of such comborbid problems can complicate diagnostic formulation, obscure the fundamental nature of the primary disorder, and limit appreciation for the full clinical manifestation (Milberger, Biederman, Faraone, Murphy, & Tsuang, 1995;Pliszka, 1998).…”