“…Interviewers were carefully trained with periodic quality checks, and their reliability with a master rater was k > 0.70 for all disorders evaluated. Parents and teachers each completed normed standardized rating scales: Conners-III parent and teacher ratings (Conners, Sitarenios, Parker, & Epstein, 1998; Purpura & Lonigan, 2009), Strengths and Difficulties Questionnaire (Goodman, 2001), and ADHD Rating Scale (DuPaul, Power, Anastopoulos, & Reid, 1998). Parents also completed an in-house standardized checklist of health conditions which included comorbid conditions of exclusion like psychosis, cerebral palsy, mental retardation, non-correctable vision problems, closed head injury, chronic sleep apnea, narcolepsy, and any neurological disorder such as epilepsy, autism, schizophrenia, or brain tumor.…”