Assessed was the degree to which classification of mental retardation levels based upon a measure of adaptive behavior (the Vineland Social Maturity Scale) differed from the classification based upon IQ for Negro and Caucasian children, 4 to 17 years of age. (Author)

Distinctions between psychological versus task helping and attempted versus achieved help were applied to the helping behaviors of normal and retarded children of 2 age groups observed in natural settings. (Authors)

Examines differences between 45 learning disabled, mentally retarded, and Title I elementary students on intelligence, academic achievement, and behavior measures. Indicates that such students perform similarly on academic achievement and behavior measures. Learning disabled and Title I students were similar on an intelligence measure; mentally…

This final report reviews the second phase of a life-span study of boys with fragile X syndrome (FSX), the most common known inherited cause of mental retardation. Males with the syndrome are more severely affected than females and in males, delays are usually evident in all the developmental domains, although cognitive and communication skills…