Factor analysis of the WISC-R at 11 age levels between 61/2 and 161/2 years.

Abstract

The Wechsler Intelligence Scale for Children-Revised (WISC-R) was factor analyzed at ages 6J-16J (n = 200 per age group). The factor structure was remarkably consistent across the age range, with three factors emerging for each group : Verbal Comprehension, Perceptual Organization, and Freedom from Distractibility, These factors resemble the factors identified for the 1949 WISC, although the WISC-R structure was more stable and in closer agreement with Wechsler's Verbal-Performance dichotomy than was the structure of its predecessor. The results of the study are discussed in terms of their clinical applications, particularly interpretation of WISC-R profiles.The 1949 WISC has been the subject of numerous factor-analytic investigations involving a wide variety of normal and exceptional samples (Cohen, 1959; Quereshi, Note 1; Rhodes, Note 2; Zimmerman & Woo-Sam, 1972, pp. 8-9). Now that the Wechsler Intelligence Scale for Children-Revised (WISC-R) is available as a replacement for the 1949 WISC, it is likely that the revised and restandardized battery will be subjected to many factor analyses in the years to come. The present investigation, which explored the factor structure of the WISC-R for the 11 age groups comprising the new standardization sample, represents the first such endeavor.Cohen (1959) factor-analyzed the 1949 WISC standardization data and identified five factors at each of the three age levels he studied (Ages 7|, 10J, and 13^ years). These factors, which corresponded fairly closely to factors he identified in earlier analyses of the Wechsler Adult Intelligence Scale (WAIS)

Cultural characteristics of learning and perceptual skills of Southeast Alaskan native 5-year-olds

“…Each procedure loaded the same subtests together, yielding the 3 factor solution shown in tables Ill and III-A. 2.4 9. l 4 15 Coding (3) The three factors observed for this group resemble those identified by Kaufman (1975) based on WISC-R standardization group data for each age group from 6 to 16 years. However, Sattler (1982) points out that the 3rd factor (labeled Freedom from Distractability in Kaufman's Analysis) emerges on the WISC-R, but not on the WPPSI.…”

“…The 3-Factor scheme described by Kaufman (1975), as observed in all of the standardization groups (age 6-16) appears to be observable in certain populations of native children, and perhaps mainly younger age groups, but should not be ruled out as a possibility among Indian groups. When it does occur, as in the early childhood sample analyzed here, it can be described as both similiar and different compared to the Wechsler factor structure of majority-culture school-age children observed by Kaufman.…”

“…For Subtests, the standardization groups have a standard score mean of 10 with a standard deviation of 3~ Recategorized scores for our sample were as shown in Table II. In order to assess the validity of the Kaufman (1975) factor analytic results with this group, all 12 subtest scores were subjected to several factor-analytic procedures 2 with oblique rotation utilized to arrive at terminal solutions. Each procedure loaded the same subtests together, yielding the 3 factor solution shown in tables Ill and III-A.…”

Analyzing of Wechsler Intelligence Scale for Children-Revised (Wisc-R) in Attention Deficit and Hyperactivity Disorder: Predictive Value of Subtests, Kaufman and Bannatyne Categories

“…1998 WÇZÖ-R'ın örüntü analizlerinde en çok öne çıkanların, Kaufman ve Bannatyne'nin oluşturduğu sınıflamalar olduğu söylenebilir. Kaufman (1975) WÇZÖ-R'ın standardizasyon örneklemi üzerinde yaptığı açımlayıcı faktör analizi çalışma-sında, WÇZÖ-R'ın ölçtüğü düşünülen iki faktör dışında bir faktörün daha olduğunu bulmuştur. Bu üç faktörü "sözel kavrama" "algısal organizasyon" ve "dikkatin dağılabilirliği" olarak tanımlamıştır.…”

A teoria subjacente à escala wechsler de inteligência para crianças (WISC)

“…Uma dessas análises foi feita por Kaufman (1975) (Kaufman & Reynolds, 1983), sendo considerado um fator menor ou menos relevante que os dois anteriores (Kaufman, Harrison & Ittenbach, 1990). Um quarto fator, denominado "Velocidade de Processamento", foi isolado através do método de análise fatorial aplicado nos subtestes do WISC III (Wechsler, 1991 …”