Comparability of WISC and PPVT Scores Among Young Children

Publisher Website
Google Scholar
Abstract
A group of 78 disadvantaged preschoolers was given the Wechsler Intelligence Scale for Children (WISC) and the Peabody Picture Vocabulary Test (PPVT). Despite the significant correlations between the WISC and PPVT IQ scores, comparison of the scores for each child showed little agreement on gross classifications of intelligence. In general, the PPVT IQ scores tended to underestimate the Verbal, Performance, and Full Scale IQ scores of the WISC and to overestimate the incidence of mental retardation. It was concluded that testing young children with the PPVT as the measure of intelligence is of dubious value for research and clinical applications.