Assessing Level of Personality Organization With the Psychodiagnostic Chart: A Validity Study

Heterogeneity within diagnostic types and comorbidity across diagnostic groups render a specific personality disorder anything but specific, leading researchers and clinicians to increasingly focus on the general severity of personality pathology. Personality pathology severity is reflected in one's level of personality organization (LPO) and research has demonstrated that LPO is a significant predictor of treatment response. This investigation examined the reliability and validity of the Psychodiagnostic Chart (PDC) in assessing the LPO dimension of the Psychodynamic Diagnostic Manual (PDM; PDM Task Force, 2006). Among a sample of 88 urban-dwelling women seeking primary medical care, the LPO dimension of the PDC received fair to good interrater reliability among 6 psychodynamic psychologists. Convergent validity was demonstrated with contrast analysis and individual correlations that yielded statistically significant associations between LPO scores and conceptually related psychodynamic variables (e.g., defensive functioning, object relations) and self-reported personality pathology scores. Support for discriminant validity was limited by the modest power associated with the sample size. Exploratory analyses examining LPO scores and measures of physical health and intimate partner violence were conducted. Our results supported the reliability, validity, and practical use of the LPO dimension of the PDC.