Because previous studies had suggestd that Down Syndrome subjects did not respond to changes in directional probability within a complex motor task as did other retarded subjects, 14 Down Syndrome 18-year-olds were given training relative to the directional probability component of the task. Performance was improved but primarily in terms of…

The effects of age, task, and egocentric responding on visual-spatial perspective taking were studied among 41 preschool children between 3.0 and 5.9 years of age. Children were individually administered three perspective-taking measures: the upside-down/right-side-up task, a block task, and a picture box task, all previously described in the…