Abstract

Korean version of WPPSI-R(Wechsler Preschool and Primary Scale of Intelligence-Revised) was adminstered to 1236 3- to 7-year-olds in three locations nationwide. According to the U.S. norm, Korean children's IQ were normally distributed between 45-160 with a mean of 104.6(SD=14.7). Interscorer reliability coefficients obtained with 136 children were high: .97 on Comprehension, .94 on Vocabulary, .96 on Similarities, .95 on Mazes and .92 on Geometric Design. For the test-retest reliability, 154 children were tested twice with intervals of 3-7 wks. The reliability coefficients were .85 for Performance IQ, .84 for Verbal IQ and .89 for the Total IQ. Factor analyses revealed two factors of 'verbal' and 'performance' IQ as predicted by Wechsler's two factor theory of intelligence. The pattern of correlations among 12 subtests was also consistent with the two factor theory: Correlations between subtests within a factor were higher than those between subtests across factors. Correlations among 'Performance' subtests were lower (.22 to .45) than those among 'Verbal' subtests(.35 to .55). Optional subtests of 'Animal Pegs' and 'Sentence' revealed the lowest correlations with other subtests. The concurrent validity was approved by analyses of correlations between WPPSI-R and KEDI-WISC as well as Korean-BINET. Based on these validity and reliability data, Korean WPPSI will be published.