title: Confirmatory factor analysis of the WMS-III in patients with temporal lobe epilepsy.
abstract: Five competing models specifying the factor structure underlying the Wechsler Memory Scale-Third Edition (D. Wechsler, 1997b) primary subtest scores were evaluated in a sample of patients with intractable temporal lobe epilepsy (N = 254). Models specifying separate immediate and delayed constructs resulted in inadmissible parameter estimates and model specification error. There were negligible goodness-of-fit differences between a 3-factor model of working memory, auditory memory, and visual memory and a nested--more parsimonious--2-factor model of working memory and general memory. The results suggest that specifying a separate visual memory factor provides little advantage for this sample--an unexpected finding in a population with lateralized dysfunction, for which one might have predicted separate auditory and visual memory dimensions.
authors.affiliation: Department of Psychology, University of Victoria, Victoria, P.O. Box 3050 STN CSC, Victoria, British Columbia V8W 3P5, Canada. nwilde@uvic.ca
authors.forename: Nancy J
authors.initials: NJ
authors.lastname: Wilde
authors.forename: Esther
authors.initials: E
authors.lastname: Strauss
authors.forename: Gordon J
authors.initials: GJ
authors.lastname: Chelune
authors.forename: Bruce P
authors.initials: BP
authors.lastname: Hermann
authors.forename: Michael
authors.initials: M
authors.lastname: Hunter
authors.forename: David W
authors.initials: DW
authors.lastname: Loring
authors.forename: Roy C
authors.initials: RC
authors.lastname: Martin
authors.forename: Elisabeth M S
authors.initials: EM
authors.lastname: Sherman
mesh_terms: D000328:Adult; D004833:Epilepsy, Temporal Lobe / Q000150:complications*; D005163:Factor Analysis, Statistical; D005260:Female; D006801:Humans; D008297:Male; D008569:Memory Disorders / Q000175:diagnosis* / Q000209:etiology*; D014888:Wechsler Scales