Initial construction and validation of the Pathological Narcissism Inventory.

TLDR

Narcissism is inconsistently defined across clinical theory, social‑personality psychology, and psychiatric diagnosis, and existing measures suffer from ambiguity between pathological and normal narcissism and limited scope, hindering integration of research and clinical findings. The study presents four investigations that derive and validate the Pathological Narcissism Inventory (PNI). The PNI is a 52‑item self‑report instrument assessing seven dimensions of pathological narcissism—four grandiose facets (Entitlement Rage, Exploitativeness, Grandiose Fantasy, Self‑sacrificing Self‑enhancement) and three vulnerable facets (Contingent Self‑esteem, Hiding the Self, Devaluing)—whose structure was confirmed by factor analysis. The PNI negatively correlated with self‑esteem and empathy, positively with shame, interpersonal distress, aggression, and borderline personality organization; grandiose scales linked to vindictive, domineering, intrusive, and overly‑nurturant problems, vulnerable scales to cold, socially avoidant, and exploitable problems; and in a small clinical sample, PNI scores associated with parasuicidal behavior, suicide attempts, homicidal ideation, and psychotherapy utilization.

Abstract

The construct of narcissism is inconsistently defined across clinical theory, social-personality psychology, and psychiatric diagnosis. Two problems were identified that impede integration of research and clinical findings regarding narcissistic personality pathology: (a) ambiguity regarding the assessment of pathological narcissism vs. normal narcissism and (b) insufficient scope of existing narcissism measures. Four studies are presented documenting the initial derivation and validation of the Pathological Narcissism Inventory (PNI). The PNI is a 52-item self-report measure assessing 7 dimensions of pathological narcissism spanning problems with narcissistic grandiosity (Entitlement Rage, Exploitativeness, Grandiose Fantasy, Self-sacrificing Self-enhancement) and narcissistic vulnerability (Contingent Self-esteem, Hiding the Self, Devaluing). The PNI structure was validated via confirmatory factor analysis. The PNI correlated negatively with self-esteem and empathy, and positively with shame, interpersonal distress, aggression, and borderline personality organization. Grandiose PNI scales were associated with vindictive, domineering, intrusive, and overly-nurturant interpersonal problems, and vulnerable PNI scales were associated with cold, socially avoidant, and exploitable interpersonal problems. In a small clinical sample, PNI scales exhibited significant associations with parasuicidal behavior, suicide attempts, homicidal ideation, and several aspects of psychotherapy utilization.