Identifying PTSD personality subtypes in a workplace trauma sample


  • Martin Sellbom,

    Corresponding author
    1. Department of Psychology, Kent State University, Kent, OH
    • Department of Psychology, 348 Gordon Palmer Hall, The University of Alabama, Tuscaloosa, AL 35487-0348
    Search for more papers by this author
  • R. Michael Bagby

    1. Clinical Research Department, Centre for Addiction and Mental Health, and Department of Psychiatry, University of Toronto, Toronto, Canada
    Search for more papers by this author

  • Martin Sellbom is now at the University of Alabama.


The authors sought to identify personality clusters derived from the Minnesota Multiphasic Personality Inventory-2 (MMPI-2) Personality Psychopathology Five Scales in a sample of workplace claimants with posttraumatic stress disorder (PTSD). Three clusters—low pathology, internalizing, and externalizing were recovered similar to those obtained by M. W. Miller and colleagues (2003, 2004, 2007) in samples of combat veterans and sexual assault victims. Internalizers and externalizers scored comparably on measures of PTSD symptom severity, general distress, and negative affect. Internalizers were uniquely characterized by anhedonia and depressed mood; externalizers by antisocial behavior, substance abuse, and anger/aggression.