The current study examined the prevalence of cognitive underperformance and symptom over-reporting in a mixed sample of psychiatric patients (N = 183). We employed the Amsterdam Short-Term Memory Test (ASTM) to measure cognitive underperformance and the Structured Inventory of Malingered Symptomatology (SIMS) to measure the tendency to over-report symptoms. We also administered neuropsychological tests (e. g., Concept Shifting Task; Rey's Verbal Learning Test) and the Symptom Checklist-90 (SCL-90) to the patients. A total of 34% of them failed the ASTM, the SIMS or both tests. ASTM and SIMS scores were significantly, albeit modestly, correlated with each other (r = -.22). As to the links between underperformance, over-reporting, neuropsychological tasks, and the SCL-90, the association between over-reporting on the SIMS and SCL-90 scores was the most robust one. The subsample that only failed on the ASTM performed significantly worse on a compound index of memory performance. Our findings indicate that underperformance and over-reporting are loosely coupled dimensions and that particularly over-reporting is intimately linked to heightened SCL-90 scores.
|Journal||Neuropsychology, Development and Cognition. Section D: The Clinical Neuropsychologist|
|Publication status||Published - 1 Jan 2011|
Dandachi-Fitzgerald, B., Ponds, R. W. H. M., Peters, M. J. V., & Merckelbach, H. (2011). Cognitive underperformance and symptom over-reporting in a mixed psychiatric sample. Neuropsychology, Development and Cognition. Section D: The Clinical Neuropsychologist , 25(5), 812-828. https://doi.org/10.1080/13854046.2011.583280