ISSN 2043-8087
Journal of Experimental Psychopathology
 Volume 4, Issue 1, 46-63, 2013
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Feigning ≠ Feigning a Memory Deficit: The Medical Symptom Validity Test as an Example

Authors
Brechje Dandachi-FitzGerald (a) and Harald Merckelbach (b)
(a) Psy-Q Mental Health Care Institute & School for Mental Health and Neuroscience, Maastricht University, Maastricht, The Netherlands
(b) Forensic Psychology Section, Maastricht University, Maastricht, The Netherlands

Volume 4, Issue 1, 2013, Pages 46-63
DOI: http://dx.doi.org/10.5127/jep.025511

Abstract
The Medical Symptom Validity Test (MSVT) is a widely used memory test with three built-in effort measures that aim to detect feigning. We evaluated the merits of the MSVT as a broad screening tool for symptom validity. In study 1, we interviewed participants (N = 54) about the symptoms that they would and would certainly not feign. Non-specific somatic symptoms and depression were mentioned most frequently. Nearly 10% of the participants stated that they would certainly not feign memory problems. Study 2 contrasted the diagnostic accuracy of the MSVT with that of a broad index of symptom exaggeration (Structured Inventory of Malingered Symptomatology; SIMS) in experimental malingerers (N = 42) who were free to choose which psychological symptoms to feign. Although both tests correctly identified all honest controls (100% specificity), the SIMS surpassed the MSVT in correctly identifying experimental malingerers (91% versus 45%). In study 3, we explored the overlap between MSVT effort parameters and SIMS scores in a psychiatric sample (N = 21). Only one MSVT parameter (Delayed Recognition) was significantly related to SIMS scores (φ = −.52, p < .05). The results indicate that memory-oriented symptom validity tests such as the MSVT may be useful for detecting feigned memory deficits but that such tests perform less well as screening tools for other types of feigned psychopathology.

Table of Contents
Introduction
Study 1
Method
  Participants and procedure
Results
Discussion
Study 2
Method
  Participants
  Measures
    Medical Symptom Validity Test (MSVT).
    Structured Inventory of Malingered Symptomatology (SIMS).
  Procedure
Results
Discussion
Study 3
Method
  Participants
  Measures and procedure
Results
Discussion
General Discussion
Acknowledgement
References
Appendix A: Instruction and Case Vignettes Study 1
  Criminal case
  Civil case
Appendix B: Instruction and Case Vignettes Study 2
  Instruction honest control group
  Instruction experimental malingerers; criminal setting
  Instruction experimental malingerers; civil setting

Correspondence to
Brechje Dandachi-FitzGerald, School for Mental Health and Neuroscience, Maastricht University, P.O. Box 616, 6200 MD Maastricht, The Netherlands.

Keywords
Feigning, Malingering, Neuropsychological assessment, Medical Symptom Validity Test, Structured Inventory of Malingered Symptomatology

Dates
Received 20 Oct 2011; Revised 30 Jan 2012; Accepted 14 Feb 2012; In Press 23 Sep 2012







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