The goal of the present investigation was to analyze data from the standardization sample of the 1981 Wechsler Adult Intelligence Scale-Revised (WAIS-R) to determine the relationships of WAIS-R IQs to the demographic variables upon which the sample was stratified. The sample included 1, 880 adults stratified according to sex and age (equal numbers of males and females within nine groups), race, occupation, urban-rural residence, geographic region, and education. There were 1, 664 whites, 192 blacks, and 24 from other nonwhite groups. Analyses of variance were conducted separately for Verbal (VIQ), Performance (PIQ), and Full Scale IQ (FSIQ). The differences in mean IQs due to sex, urban-rural residence, and geographic regions were nonsignificant. However, there were significant differences that were due to race and education level, and there were also sizeable differences noted for occupational groups. There was a 1412-point difference in favor of whites over blacks on FSIQ. Differences due to education and occupation were striking: College graduates earned FSIQs that were 3212 points higher than the FSIQs of individuals with 7 years or less of schooling, and professional and technical workers outscored unskilled workers on the WAIS-R Full Scale by 22 points.
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