Nine infants with Down's syndrome, seven nonhandicapped infants, and one severely handicapped infant were given the choice of listening to familiar nursery rhymes or to the same rhymes with each word reversed so that the rhythms, intonation and stress patterns were kept intact but the words became nonsense. (RH)

Background: Several theorists maintain that exact number abilities rely on language-relevant processes whereas approximate number calls on visuo-spatial skills. We chose two genetic disorders, Williams syndrome and Down's syndrome, which differ in their relative abilities in verbal versus spatial skills, to examine this hypothesis. Five…

Surveys 30 studies involving 104 separate tests of the "similar structure hypothesis" which holds that, when nonorganically impaired retarded and nonretarded persons are similar in developmental level, they are also similar in the processes and concepts by which they reason. (Researchers distinguished between studies that excluded…

Fast mapping of novel words for objects was compared in 48 children/adolescents with Down syndrome and 48 mental-age matched children. The groups did not differ in their ability to infer a connection between the novel word and referent, comprehend the novel word after a single exposure, and produce the novel word correctly. (Author/JDD)

Forty-nine children (ages 8-17) with mental retardation recognized facial expressions less accurately than did subjects without retardation who were matched on chronological age. Mental age-matched groups showed no differences in accuracy at a younger mental age, but a difference was found at an older mental age. (Author/JDD)