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Classification Accuracy of MMPI-2 Validity Scales in the Detection of Pain-Related MalingeringA Known-Groups StudyUniversity of New Orleans, Jefferson Neurobehavioral Group
Loyola University New Orleans, Jefferson Neurobehavioral Group
University of New Orleans, Jefferson Neurobehavioral Group, kgreve@uno edu
Jefferson Neurobehavioral Group
Center for Neurosciences, Orthopedics and Spine The purpose of this study was to determine the accuracy of Minnesota Multiphasic Personality Inventory 2nd edition (MMPI-2; Butcher, Dahlstrom, Graham, Tellegen, & Kaemmer, 1989) validity indicators in the detection of malingering in clinical patients with chronic pain using a hybrid clinical-known groups/simulator design. The sample consisted of patients without financial incentive (n = 23), nonmalingering patients with financial incentive (n = 34), patients definitively determined to be malingering based on published criteria ( n = 32), and college students asked to simulate pain-related disability (n = 26). The MMPI-2 validity scales differentiated malingerers from nonmalingerers with a high degree of accuracy. Hypochondriasis and Hysteria were also effective. For all variables except Scale L, more extreme scores were associated with higher specificity. This study demonstrates that the MMPI-2 is capable of differentiating intentional exaggeration from the effects on symptom report of chronic pain, genuine psychological disturbance, and concurrent stress associated with pursuing a claim in a medico-legal context.
Key Words: chronic pain malingering MMPI-2 somatization psychological assessment spine surgery
This version was published on December
1, 2008 Assessment, Vol. 15, No. 4,
435-449 (2008) |
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