Intelligence levels of Down's syndrome children.

Intelligence levels of a sample of 180 Down's syndrome children were reported, and the results indicated that their abilities are not as limited as previously thought. The introduction of special developmental programs from birth onwards appears to have promoted an increase in intellectual development. Lack of extended educational opportunity may account for the apparent decrease in intellectual function in Down's syndrome adolescents. It is suggested that school placement be based on demonstrated present ability rather than assumed long-term potential inferred from autosomal and physical characteristics.