This study examined the construct validity of Narcissistic Personality Disorder (NPD) by examining the relations between NPD and measures of psychological distress and functional impairment both concurrently and prospectively across two samples. In particular, the goal was to address whether NPD typically "meets" Criterion C of the DSM-IV definition of Personality Disorder, which requires that the symptoms lead to clinically significant distress or impairment in functioning. Sample 1 (N =152) was composed of individuals receiving psychiatric treatment, while Sample 2 (N=151) was composed of both psychiatric patients (46%) and individuals from the community. NPD was linked to ratings of depression, anxiety, and several measures of impairment both concurrently and at 6-month follow-up. However, the relations between NPD and psychological distress were (a) small, especially in concurrent measurements, and (b) largely mediated by impaired functioning. NPD was most strongly related to causing pain and suffering to others, and this relationship was significant even when other Cluster B personality disorders were controlled. These findings suggest that NPD is a maladaptive personality style which primarily causes dysfunction and distress in interpersonal domains. The behavior of narcissistic individuals ultimately leads to problems and distress for the narcissistic individuals and for those with whom they interact.
Narcissistic Personality Disorder: Relations with distress and functional impairmentNarcissistic personality disorder (NPD), despite substantial interest from a theoretical perspective, has received very little empirical attention (1). In fact, some have concluded that "most of the literature regarding patients suffering with narcissistic personality disorder is based on clinical experience and theoretical formulations, rather than empirical evidence" (2; p. 303). A large majority of empirical studies on narcissism come from a social-personality psychology perspective which, while methodologically sophisticated and important, may not pertain to Narcissistic PD given the reliance on undergraduate samples and the use of the Narcissistic Personality Inventory (NPI, 3). Trull and McCrae (4) have noted that narcissism measured by the NPI appears to be made up of high Extraversion, low Agreeableness, and low Neuroticism from the Five-Factor Model of personality (5), while DSM definitions suggest low Agreeableness, high Neuroticism and no relation with Extraversion. These authors suggest that "most narcissistic scales do not square well with DSM-III-R criteria for NAR" (4; p.53).1 Correspondence concerning this article can be addressed to Joshua D. Miller, Ph.D., Psychology Building, Department of Psychology, University of Georgia, Athens, GA 30602. Fax: (706) 542-8048 E-mail: jdmiller@uga.edu. Publisher's Disclaimer: This is a PDF file of an unedited manuscript that has been accepted for publication. As a service to our customers we are providing this early version of the manuscript. The manuscript will un...