Suppressed working memory on the WMS-III as a marker for poor effort

Lange, Rael T., Iverson, Grant L., Sullivan, Karen A., & Anderson, Deborah S. (2006) Suppressed working memory on the WMS-III as a marker for poor effort. Journal of Clinical and Experimental Neuropsychology, 28(3), pp. 294-305.

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The purpose of this study was to examine the clinical utility of memory minus Working Memory Index (memory-WMI) discrepancy scores on the WMS-III for detecting poor effort in 145 personal injury litigants (19 poor effort, 126 adequate effort). On average, participants in the poor effort group performed significantly lower on all WMS-III memory indexes and demonstrated larger memory-WMI discrepancy scores compared to participants in the adequate effort group. Discriminant function analyses using memory-WMI discrepancy scores as independent variables revealed poor overall classification rates (60.0% to 63.4%). Based on the prevalence of unusually suppressed attention-concentration ability relative to memory functioning using unidirectional memory-WMI discrepancy scores, high specificity and negative predictive power values were found. However, there was unacceptably low sensitivity and positive predictive power. These results suggest that memory-WMI discrepancy scores on the WMS-III do not provide clinically useful information regarding response set and should be used cautiously as an indicator of poor effort.

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5 citations in Scopus
5 citations in Web of Science®
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ID Code: 2974
Item Type: Journal Article
Refereed: Yes
Keywords: Neuropsychology, malingering, faking, psychology, memory
DOI: 10.1080/13803390490918156
ISSN: 1744-411X
Subjects: Australian and New Zealand Standard Research Classification > MEDICAL AND HEALTH SCIENCES (110000)
Divisions: Current > QUT Faculties and Divisions > Faculty of Health
Current > Institutes > Institute of Health and Biomedical Innovation
Copyright Owner: Copyright 2006 Taylor & Francis
Copyright Statement: First published in Journal of Clinical and Experimental Neuropsychology 28(3):pp. 294-305.
Deposited On: 16 Nov 2006 00:00
Last Modified: 29 Feb 2012 13:25

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