2001m-768 adolescent adult attention-deficitdisorderinadolescence attention-deficitdisorderinadults attention-deficithyperactivitydisorder attentiondeficitdisorderwithhyperactivity autism autisticdisorder autisticyouth diseases learningdisabled learningdisabledteenagers learningdisorders methods nervoussystem nervoussystemdiseases neuropsychology psychology