Journal
CLINICAL NEUROPSYCHOLOGIST
Volume 23, Issue 2, Pages 329-342Publisher
TAYLOR & FRANCIS INC
DOI: 10.1080/13854040801945060
Keywords
Symptom validity; Dementia; Medical Symptom Validity Test; Neuropsychological assessment; Forensic neuropsychology
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When assessing symptom validity in patients with dementia, traditional approaches may be inappropriate because neurological factors may cause altered performance. The Medical Symptom Validity Test has a Dementia Profile that explicitly recognizes this fact. We prospectively evaluated classification accuracy of the Dementia Profile for 52 referrals to a memory disorders clinic. The Dementia Profile correctly classified 36/52 patients. Sensitivity was 54.8%, specificity was 90.5%, positive predictive value was 89.5%, negative predictive value was 60.0%, and the likelihood ratio was 5.77. Of 31 patients with dementia, 11 did not fail symptom validity indices. When only considering patients who failed symptom validity indices, sensitivity of the Dementia Profile was 85%. Classification accuracy statistics are also provided for the Genuine Memory Impairment Profile.
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