Cognitive underperformance and symptom over-reporting in a mixed psychiatric sample

B. Dandachi-Fitzgerald*, R.W.H.M. Ponds, M.J.V. Peters, H. Merckelbach

*Corresponding author for this work

Research output: Contribution to journalArticleAcademicpeer-review

54 Citations (Web of Science)

Abstract

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.
Original languageEnglish
Pages (from-to)812-828
Number of pages17
JournalNeuropsychology, Development and Cognition. Section D: The Clinical Neuropsychologist
Volume25
Issue number5
DOIs
Publication statusPublished - 1 Jan 2011

Keywords

  • Underperformance
  • Over-reporting
  • Symptom validity tests
  • Amsterdam Short-Term Memory Test
  • Structured Inventory of Malingered Symptomatology
  • PSYCHOGENIC NONEPILEPTIC SEIZURES
  • STRUCTURED INVENTORY
  • PSYCHOLOGICAL-ASSESSMENT
  • VALIDITY SCALES
  • NORMATIVE DATA
  • BRAIN-INJURY
  • TEST FAILURE
  • POOR EFFORT
  • PERFORMANCE
  • VALIDATION

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