The Treatment of Histrionic and Narcissistic Personality Disorder Behaviors: A Single-Subject Demonstration of Clinical Improvement Using Functional Analytic Psychotherapy

This article presents single-subject data for the treatment of histrionic and narcissistic personality disorder behaviors using a relatively brief course of an interpersonal therapy, Functional Analytic Psychotherapy (Kohlenberg & Tsai, 1991). The treatment produced significant changes in these behaviors both statistically and qualitatively. Empirical methods for analyzing the changes across sessions and for determining that the therapist engaged in the proposed mechanism of clinical change are discussed. While these data are for one subject, the results of treatment provide both a method of treating difficult and long-standing client behaviors such as these, and for assessing the progress of therapy.