Psychometric properties and factor structure of the Wechsler Memory Scale-Revised in a sample of persons with intractable epilepsy.
The Wechsler Memory Scale-Revised (WMS-R) is used routinely as a presurgical assessment of memory for clients considering elective resection of the temporal lobe and/or hippocampus for the relief of intractable temporal lobe epilepsy. This research investigated the psychometric properties of the WMS-R in a population of people with epilepsy. The sample consisted of 181 patients with a diagnosis of epilepsy who underwent a complete neuropsychological examination as a routine part of their investigation. The results confirm that the WMS-R has acceptable levels of reliability as measured by internal consistency. A factor analysis revealed a consistent three-factor structure: Visual Memory, Verbal Memory, and Attention/ Concentration factors. Multiple regression analysis, however, indicated that the Visual Memory index was susceptible to a number of influences, throwing into question whether it is a pure measure of nonverbal memory functioning.
Moore
P M
PM
Walton Centre for Neurology and Neurosurgery, Liverpool, UK.
Baker
G A
GA
D000293:Adolescent; D000328:Adult; D001288:Attention / Q000502:physiology; D004351:Drug Resistance; D004827:Epilepsy / Q000188:drug therapy / Q000523:psychology* / Q000601:surgery; D004833:Epilepsy, Temporal Lobe / Q000523:psychology; D005163:Factor Analysis, Statistical; D005260:Female; D006801:Humans; D008297:Male; D011939:Mental Recall; D009483:Neuropsychological Tests; D011184:Postoperative Period; D011594:Psychometrics; D012044:Regression Analysis; D015203:Reproducibility of Results; D014888:Wechsler Scales / Q000706:statistics & numerical data*