This study examined whether typically developing (TD) twins of non-TD children demonstrate enhanced empathy and prosociality. Of 778 Hebrew-speaking Israeli families who participated in a twin study, 63 were identified to have a non-TD child with a TD twin, and 404 as having both twins TD. TD twins of non-TD children (27% males) were compared to…

Determined whether there are developmental precursors to accidents and resulting physical impairment. Data collected at ages 8 and 14 (147 males and 142 females) were related to the number of types of accidents and impairment by the age of 27. Accidents and impairment were most frequent among individuals whose behavior had been characterized by…

Tested prefrontal and hippocampal functions in school-aged individuals with Down syndrome (DS) compared functions with those of typically developing children individually matched on mental age. Found that hippocampal and prefrontal composite scores contributed unique variance to the prediction of mental age and adaptive behavior. Noted a…

Compared the spontaneous leg movements of 10 infants with Down Syndrome to those of nondisabled infants matched for chronological age and motor age. Contrary to expectations, no significant difference was found in the frequency of leg movements between the two groups. However, Down Syndrome subjects demonstrated significantly fewer of the most…

Examines differences in habituation in a visual attention task as a function of chronological age, mental age, and handicapping condition. Subjects were 102 children who ranged in age from 3 to 36 months and who were classified as Down Syndrome, cerebral palsied, developmentally delayed, or multiply handicapped. (Author/RH)