Relationship of scores on the Wechsler preschool and primary scale of intelligence and the stanford-binet intelligence scale form LM

Abstract

A preschool sample of 25 boys and 25 girls (mean age, 58 months) was administered the Wechsler Preschool and Primary Scale of Intelligence (WPPSI) and the Stanford-Binet Form LM (SB). WPPSI Verbal, Performance, and Full Scale IQ scores correlated .84, .60, and .82 respectively with the SB IQ scores. In spite of this high positive relationship, WPPSI and SB scores were not interchangeable. The full Scale WPPSI consistently yielded lower IQs than did the SB ( p < .01). WPPSI correlations with the SB and WPPSI subtest correlations with the three WPPSI scales closely followed the same pattern as the respective Wechsler Intelligence Scale for Children correlations at an older age level. Girls scored higher than boys on the Verbal Scale ( p < .02) and on the Full Scale ( p < .05).