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The impact of pathological narcissism on psychotherapy has seldom been investigated empirically, despite extensive clinical theory proposing that highly narcissistic individuals should be reluctant to engage in treatment and derive smaller benefits from therapy. In this study, we investigate the relationship between scores on the Pathological Narcissism Inventory (PNI; Pincus et al., 2009 Pincus, A. L., Ansell, E. B., Pimentel, C. A., Cain, N. M., Wright, A. G. C. and Levy, K. N. 2009. Initial construction and validation of the Pathological Narcissism Inventory. Psychological Assessment, 21: 365–379. doi:10.1037/a0016530Crossref, PubMed, Web of Science ® , Google Scholar), which assesses both narcissistic grandiosity and narcissistic vulnerability, and clinical variables in a sample of outpatients (N = 60) at a community mental health center. Results indicated that grandiosity, but not vulnerability, was negatively related to the use of adjunctive services and positively predicted client-initiated termination of psychotherapy. In addition, grandiosity and vulnerability were related to initial levels of different symptoms in multilevel models using a subsample (n = 41) but not generally related to the linear rate of symptom change in early psychotherapy. The results highlight the clinical utility of assessing pathological narcissism in a real-world psychotherapeutic context.
Ellison et al. (Tue,) studied this question.