A standardized neuropsychological battery was administered in a single day to each child by a trained examiner blind to subject group. The CIFASD II test battery focuses more heavily on the domain of executive function than our previous test battery, (Mattson et al., 2010a) although it does include a range of cognitive domains, including general intellectual function, attention, and memory. Parent interviews and questionnaires were administered to primary caregivers. Caregivers completed the clinician-assisted National Institute of Mental Health Computerized Diagnostic Interview Schedule for Children IV (C-DISC-4.0; Shaffer et al., 2000) to determine ADHD diagnosis, along with any comorbid psychopathology. The C-DISC-4.0 provides diagnostic information based on the Diagnostic and Statistical Manual of the American Psychiatric Association (DSM-IV; American Psychiatric Association, 2000). Informed assent and consent were obtained from all subjects and their parents prior to testing. Subject incentive was provided to parents and children. The Institutional Review Board (IRB) at San Diego State University and other CIFASD sites approved this study.
