Comparison of Otis-Lennon Mental Ability Test, Elementary i Level and WISC-R IQs among Suspected Mental Retardates

Abstract

Correlations of .72, .59, and .76 were computed between the Otis-Lennon I and WISC-R Verbal, Performance, and Full Scale IQs respectively for a group of 119 public school students suspected to be mentally retarded. On this basis, WISC-R Verbal and Full Scales seem to be more sensitive than the WISC-R Performance Scale to the mental processes measured by the Otis-Lennon I. Mean differences were not significant for Full Scale IQs ( p < .05). Moderate correlations between the subtest scaled scores were reported. Correlations and t tests for stratified samples by race were also computed. Values for Comprehension, Picture Completion scaled scores and Performance scaled scores were very low for Negro children (.18, −.01, .05).