Analysis of WISC-R Standardization Data in Terms of the Stratification Variables

KAUFMAN, ALAN S., and DOPPELT, JEROME E. Analysis of WISC-R Standardization Data in Terms of the Stratification Variables. CmID DEVELOPMENT, 1976, 47, 165-171. The sampling plan for the standardization of the Wechsler Intelligence Scale for Children-Revised was based on age groups stratified along the variables of sex, race, geographic region, parental occupation, and type of residence (urban vs. rural). The verbal, performance, and full-scale IQs of the standardization sample were analyzed according to classifications along these variables. Findings were compared with corresponding data in a study of the WISC standardization sample reported in 1950. The relationship between IQ and sex and between IQ and parental occupation group has not changed, although the differences between IQs of ruraland urbanreared youngsters have become smaller in the course of a generation. IQ differences between the sexes are not of practical importance. The average IQs of whites in the sample were about 1 SD higher than those of blacks, and IQ differences among the 5 parental occupation groups were also substantial. Regional differences were larger for blacks than for whites.