Cognitive and behavioural profiles of the elderly mentally handicapped

In 148 mentally handicapped in-patients aged between 65 and 88 years, evidence was found for ongoing intellectual development in adulthood until late middle-age. This was usually followed by a decline in intellectual functioning which became significant in 18%. For these, intellectual deterioration was associated with deficient self-care skills, poor orientation and staff reports of deterioration. It was not related to previous ability levels or prolonged hospitalization. For the entire sample, competence in self-care skills was high though behaviour disturbance was present in about half. Results are discussed in terms of their implications for the care and training of the elderly mentally handicapped.