In Texas, placement of educable mentally retarded (EMR) students has required three factors-- intellectual assessment, educational appraisal, and adaptive behavior. This study examined 28 reclassified EMR students to determine which assessment factor is least stable in defining EMR and to determine significance of change in assessment scores. Data were secured from school records. Type of intellectual assessment test used varied greatly and was found to be the most inconsistent placement factor. However, educational appraisal scores contributed to over half the reclassifications. Adaptive behavior did not contribute to any reclassification. Due to limited sampling and variety of assessment tests, significance of change in scores was not determined. Generally, on retest,performance IQ scores were elevated while verbal IQ scores remained the same.

The purpose of the study was to develop a revision of the logical reasoning section of the California Test of Mental Maturity which increases its discriminative ability while maintaining an acceptable measure of reliability. Subjects were 102 students of general psychology classes at North Texas State University. All were administered the Logical Reasoning section of the California Test of Mental Maturity in its original form and an experimental revision of it (LRTR). The Wesman Personnel Classification Test was administered at the same time to demonstrate the tests' construct validity. Pearson product-moment correlations, item and homogeneity analyses were run. Results indicated that the revised test correlated significantly with the original test and the WPCT. Internal validity of the revised test was satisfactory, showing an improvement over the original test in terms of clarity, reliability and homogeneity.

The purpose of this study is to add to the body of knowledge concerning intelligence, self-concept, and social competency as related to the habilitation of retardates by investigating the following problem: what is the relationship between intelligence, self-concept, and social competency among the mentally retarded?

This study explored the usefulness of the Metropolitan Readiness Tests (MRT) as a screening device for minimal brain injury. It was hypothesized that brain injured (BI) children would score significantly lower on Test Six of the MRT than non-brain injured (NBI) children. Test Six is a visual-motor perceptual task.

The problem under investigation was the predictive value of a preschool screen. The subjects were 111 kindergartners. First, the need for a preschool screen was established. Second, the literature concerning other preschool devices was reviewed. Third, a specific screen was assessed in terms of validity. Fourth, a consideration of the predictive value of this screen in relation to scholastic achievement as indicated by the Metropolitan Readiness Test was made. A multiple regression analysis was performed, and the cross-validation of a number of prediction equations and cutoff scores was significant. Although statistical significance was achieved, high-risk youngsters could not be accurately identified. This research indicated that the instrument evaluated shows promise if refined by additional research.

The present study explored the possibility of applying Koppitz's developmental scoring techniques of mental maturity to retarded adults. The following hypotheses were tested: 1) that there is a significant correlation between the Koppitz HFD Test scores and the WAIS Full Scale scores; 2) that the correlation between the Koppitz HFD Test scores and the WAIS Performance Scale scores is also significant. Statistical computations did confirm the latter hypothesis but not the former one.