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KMID : 1143820120080010022
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Anxiety and Mood
2012 Volume.8 No. 1 p.22 ~ p.30
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Measuring Symptom Exaggeration in Posttraumatic Stress Disorder using the MMPI-2 and the Personality Assessment Inventory Symptom Validity Scale
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Kong Sung-Whoi
Chae Jeong-Ho
Lee Jong-Hun
Han Sang-Woo
Park Eun-Jin
Choi Kyeong-Sook
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Abstract
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Objective : We investigated whether Posttraumatic stress disorder patients have a higher tendency to exaggerate the extent of their psychological symptoms compared to other psychiatric patients.
Methods : Medical records of patients, who had received psychiatric treatment at four university hospitals in Korea between January 2009 and December 2010, were retrospectively reviewed. We compared a group of 37 patients diagnosed with PTSD, and another group of 41 patients diagnosed with neurotic, stress-related and somatoform disorders according to the ICD-10. To compare the extent of malingering in the two groups, we compared the validity scales of MMPI-2 and Personality Assessment Inventory. We determined the number of participants in both groups feigning their responses by using various cutoff scores of the validity indicators.
Results : The PTSD group showed significantly higher scores on the F (p=0.001), F (B)(p=0.000), F (P)(p=0.030), F-K (p=0.003) scale of the MMPI-2 compared to the other group of psychiatric patients. The PTSD group had a significantly higher NIM score (p=0.001) but a lower PIM score (p=0.020) of the PAI compared to the other group of psychiatric patients. Using the cutoff scores, the PTSD group showed a significantly higher number of patients who feigned responses compared to the other group ( (p=0.010), (p=0.005), (p=0.011) from the MMPI-2, and (p=0.001) from the PAI).
Conclusion : These results suggest that PTSD patients have a tendency to exaggerate their symptom. This group of patients overreported the severity of their condition during standardized personality assessment that included the MMPI-2 or PAI compared to patients diagnosed with other psychiatric disorders. Additional research is required to determine the factors influencing symptom exaggeration in PTSD
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KEYWORD
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PTSD, Symptom exaggeration, Malingering, MMPI-2, PAI
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