Comparability of the WPPSI-R and the S-B:IV among Preschool Children

Abstract
This study sought to establish concurrent validity between the Stanford-Binet: Fourth Edition (S-B:IV) and the Wechsler Preschool and Primary Scale of Intelligence-Revised (WPPSI-R). Both tests were administered in a counterbalanced order to 30 preschool children who were attending a summer enrichment program. The results indicated that the Full-Scale IQ of the WPPSI-R and the Composite SAS of the S-B:IV yielded similar scores. Additional findings suggest that although no significant differences existed between the abstract/visual scales of both measures, a significant difference did exist between the two verbal scales. Analysis that compared the S-B:IV Factor scores to WPPSI-R IQs found the same pattern of results. The practical implications of these findings, and their usefulness for school psychologists who work with preschool-aged children, are discussed.