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  • Title: MMPI F-K index among hospitalized Vietnam veterans.
    Author: Hyer L, Woods M, Harrison WR, Boudewyns P, O'Leary WC.
    Journal: J Clin Psychol; 1989 Mar; 45(2):250-4. PubMed ID: 2723080.
    Abstract:
    The F-K index of the MMPI has been used as a marker of symptom overreporting. One population for which previous research has shown this pattern is Vietnam in-country veterans with PTSD. This study assessed the F-K index on 515 inpatients: 329 Vietnam in-country and 186 Vietnam-era patients. Normative data on psychiatric inpatients were presented. Also, a special MMPI subscale (MMPI-PTSD), a measure to identify PTSD among these veterans, was used. Results showed that all Vietnam veterans, especially in-country veterans, overreport symptoms to a high degree. The overall mean for in-country vets was 7.3. Also, when the special MMPI-PTSD subscale was used, a vast majority of in-country veterans who were in the PTSD range had high F-K index scores. Dissimulation as a symptom of PTSD was discussed.
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