Issues resolved and unresolved in pathological narcissism.

Narcissism is one of the oldest personality constructs, and yet debates about its definition and structure have been a topic of intense debate over the past decade. Recent independent reviews of the literature have proposed conceptually identical triarchic structural models of individual differences in pathological narcissism. In each model entitlement serves as the core of the construct, and its expression is moderated by basic personality/temperament to manifest in exhibitionism or vulnerability. However, the clinical observation that individuals high in pathological narcissism vacillate between grandiose and vulnerable states remains understudied and poorly understood. We review the recent research that has driven the contentious debates, emerging points of consensus, and necessary future directions for research.