Finally, the Behavior Assessment System for Children-2 (BASC-2; Reynolds & Kamphaus, 2002) was also used to assess ADHD severity in children. T-scores of teacher reports on the Hyperactivity and Attention Problems subscales were summed to derive a measure of ADHD severity. The BASC-2 has good reliability and validity for both clinical and normative samples (Reynolds & Kamphaus, 2002). In our sample, Cronbach’s alphas at BL, F1, F2, and F3 were .75, .75, .72, and .86, respectively.
