Individual change and variation in emotional/behavioral disturbance in children and adolescents with intellectual disability has received little empirical investigation. Based on 11 years of longitudinal data from the Australian Child to Adult Development Study, we report associations among individual differences in level, rate of change, and…

Tests designed to determine behavioral, emotional, social and academic changes occurring in hyperkinetic subjects were administered during childhood and 13 years later. Findings were more positive than other longitudinal studies. Some secondary symptoms, possibly precursors to later psychopathology, appeared. This population, therefore, is still…