Factor analyses of ratings received by 617 patients in a state hospital for the mentally retarded, concerning 26 problem behaviors, indicated that five factors describe the behaviors. (Author)

Three Scales of imitative behavior (nonverbal, vocal, and verbal) were administered to 28 Down's syndrome Ss (mean age 26 years) and 56 Ss (mean age 26.8 years) with other diagnoses in order to test the hypothesis that Down's syndrome individuals "are outstanding in their mimicry". (Author/PHR)

The development of a scale to assess drug and other treatment effects on severely mentally retarded individuals is described. Separate factor analyses of the data from two samples resulted in a five-factor scale: (1) Irritability, Agitation, Crying; (2) Lethargy, Social Withdrawal; (3) Stereotypic Behavior; (4) Hyperactivity, Noncompliance; and…

Evaluated was the extent to which psychologists and physicians made use of a measure of adaptive behavior in the classification of 100 mentally retarded children (5 to 16 years of age) during a 10 year period. (Author/MC)

Twenty-seven teachers rated 196 retarded workers with respect to the frequency of maladaptive behavior and the 28 items of a language behavior rating scale with respect to the probability that a given behavior would result in termination of employment. (Author/SBH)

Patterns of emotional and behavior problems among 360 educable mentally retarded (EMR) and 360 nonretarded elementary and secondary students were studied through factor analysis of teachers' rating scale evaluations. EMR groups could be discriminated from nonretarded groups on the aggression, attention disorder, and anxiety/inferiority factors.…