Confirmatory factor analysis of the WMS-III in patients with temporal lobe epilepsy.
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.
Wilde
Nancy J
NJ
Department of Psychology, University of Victoria, Victoria, P.O. Box 3050 STN CSC, Victoria, British Columbia V8W 3P5, Canada. nwilde@uvic.ca
Strauss
Esther
E
Chelune
Gordon J
GJ
Hermann
Bruce P
BP
Hunter
Michael
M
Loring
David W
DW
Martin
Roy C
RC
Sherman
Elisabeth M S
EM
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