Factor structure of the Italian version of the WAIS-R compared with the American standardization.
Factor analysis for responses to the WAIS-R by 1,630 adults of the Italian standardization sample produced two factor solutions in different age groups, and showed high factorial similarity when compared with the same American solution. An estimate of g factor and variance components showed some difference with American data: a lower proportion of g and common variance, and a greater specificity characterized the Italian version with an almost identical error variance. For both the estimate of g and variance components some change across age groups was observed with g and common variance increasing and specific variance decreasing from youngest to oldest groups.
University of Rome La Sapienza, Italy.
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Orsini
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Laicardi
D000293:Adolescent; D000328:Adult; D017677:Age Distribution; D000367:Age Factors; D000704:Analysis of Variance; D003431:Cross-Cultural Comparison; D005163:Factor Analysis, Statistical; D005260:Female; D006801:Humans; D007558:Italy; D008297:Male; D008875:Middle Aged; D011594:Psychometrics; D012680:Sensitivity and Specificity; D014177:Translations; D014481:United States; D014888:Wechsler Scales / Q000706:statistics & numerical data*