Results of the study with 24 mildly or moderately retarded subjects (ages 11-55 years) indicates that a separability hypothesis of perceptual development can be extended to retarded populations. Representation as wholistic objects dominated among moderately retarded subjects, and with increasing intelligence, representation of objects as component…

Comparison of the mental status of 30 subjects with Down's Syndrome mosaicism and 30 matched subjects with trisomy 21 Down's Syndrome found that the mean intelligent quotient of the mosaic Down's Syndrome group was significantly higher and that this group showed better verbal abilities and more normal visual-perceptual skills. (Author/DB)

Comparison of 384 male and 91 female autistic children (three through eight years old) revealed that females as a group scored less well on intelligence tests. Boys also performed better than girls on eye-hand integration and perceptual tasks. Predictions of female superiority in affect and receptive vocabulary were not supported. (CL)

Data from the Japanese standardization of the Wechsler Preschool and Primary Scale for Intelligence were used to analyze the structure of abilities of Japanese children in terms of the Burt-Vernon hierarchical model of intelligence. It was suggested that the pattern of cognitive strengths and weaknesses that emerged would help clarify a number of…

Rural Black and White children of variant academic achievement were tested on the Minnesota Percepto-Diagnostic Test, which consists of six gestalt designs for the subject to copy. Analyses resulted only in a significant achievement effect; when intellectual level was statistically controlled, race was not a significant variable. (Editor/SJL)