“…Riccio, Hynd, Cohen, and Gonzalez (1993) found that teacher ratings of ADHD and other behavioural problems predicted performance on a measure of set-shifting, whereas parent ratings failed to do so. Together with these earlier studies, the present study fits with the finding that teachers, as opposed to children and parents, are the optimal informants for ADHD symptoms (Loeber, Green, & Lahey, 1990;Loeber, Green, Lahey, & Stouthamer-Loeber, 1989, 1991Power et al, 1998).…”