Toward a model for assessing level of personality functioning in DSM-5, part II: empirical articulation of a core dimension of personality pathology.
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The extensive comorbidity among Diagnostic and Statistical Manual of Mental Disorders (4th ed. [DSM-IV]; American Psychiatric Association, 1994 ) personality disorders might be compelling evidence of essential commonalities among these disorders reflective of a general level of personality functioning that in itself is highly relevant to clinical decision making. This study sought to identify key markers of such a level, thought to reflect a core dimension of personality pathology involving impairments in the capacities of self and interpersonal functioning, and to empirically articulate a continuum of severity of these problems for DSM-5. Using measures of hypothesized core dimensions of personality pathology, a description of a continuum of severity of personality pathology was developed. Potential markers at various levels of severity of personality pathology were identified using item response theory (IRT) in 2 samples of psychiatric patients. IRT-based estimates of participants' standings on a latent dimension of personality pathology were significantly related to the diagnosis of DSM-IV personality disorder, as well as to personality disorder comorbidity. Further analyses indicated that this continuum could be used to capture the distribution of pathology severity across the range of DSM-IV personality disorders. The identification of a continuum of personality pathology consisting of impairments in self and interpersonal functioning provides an empirical foundation for a "levels of personality functioning" rating proposed as part of a DSM-5 personality disorder diagnostic formulation.
author list (cited authors)
Morey, L. C., Berghuis, H., Bender, D. S., Verheul, R., Krueger, R. F., & Skodol, A. E.
complete list of authors
Morey, Leslie C||Berghuis, Han||Bender, Donna S||Verheul, Roel||Krueger, Robert F||Skodol, Andrew E