Published online by Cambridge University Press: 29 October 2015
Hyperactive children first diagnosed as toddlers were followed up into the early school years. When Compared with matched normal children the hyperactives showed clear problems in behaviour temperament, and cognitive development, at the time of first assessment. After two follow-up assessments at 5 and 6 years of age the only differences remaining between the groups were those involving hyperactive and conduct problem behaviour and a difficult temperament profile. Academic progress was normal although this may have been influenced by sample attrition where lower I.Q. children dropped out. Hyperactive children remained at risk for behavioural problems at home and at school.