Confirmatory Factor Analysis of the WAIS-IV/WMS-IV
Open Access
- 5 January 2011
- journal article
- research article
- Published by SAGE Publications in Assessment
- Vol. 18 (2), 178-191
- https://doi.org/10.1177/1073191110393106
Abstract
The Wechsler Adult Intelligence Scale—fourth edition (WAIS-IV) and the Wechsler Memory Scale—fourth edition (WMS-IV) were co-developed to be used individually or as a combined battery of tests. The independent factor structure of each of the tests has been identified; however, the combined factor structure has yet to be determined. Confirmatory factor analysis was applied to the WAIS-IV/WMS-IV Adult battery (i.e., age 16-69 years) co-norming sample ( n = 900) to test 13 measurement models. The results indicated that two models fit the data equally well. One model is a seven-factor solution without a hierarchical general ability factor: Verbal Comprehension, Perceptual Reasoning, Processing Speed, Auditory Working Memory, Visual Working Memory, Auditory Memory, and Visual Memory. The second model is a five-factor model composed of Verbal Comprehension, Perceptual Reasoning, Processing Speed, Working Memory, and Memory with a hierarchical general ability factor. Interpretative implications for each model are discussed.Keywords
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