A confirmatory factor analysis of the WMS-III in a clinical sample with crossvalidation in the standardization sample

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Abstract

A maximum likelihood confirmatory factor analysis (CFA) of the Wechsler Memory Scale-III (WMS-III) was performed by applying LISREL 8 to a general clinical sample (n=281). Analyses were designed to determine which of seven hypothesized oblique factor solutions could best explain memory as measured by the WMS-III. Competing latent variable models were identified in previous studies. Results in the clinical sample were crossvalidated by testing all models in the WMS-III standardization samples (combined n=1,250). Findings in both the clinical and standardization samples supported a four-factor model containing auditory memory, visual memory, working memory, and learning factors. Our analysis differed from that presented in the WMS-III manual and by other authors. We tested our models in a clinical sample and included selected word list subtests in order to test the viability of a learning dimension. Consistent with prior research, we were also unable to empirically support the viability of the immediate and delayed memory indices, despite allowing the error terms between the immediate and delayed memory subtests to correlate. © 2002 Published by Elsevier Ltd on behalf of National Academy of Neuropsychology.

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Bradley Burton, D., Ryan, J. J., Axelrod, B. N., Schellenberger, T., & Richards, H. M. (2003). A confirmatory factor analysis of the WMS-III in a clinical sample with crossvalidation in the standardization sample. Archives of Clinical Neuropsychology, 18(6), 629–641. https://doi.org/10.1016/S0887-6177(02)00149-X

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