The relation between the Narcissistic Personality Inventory (NPI, Raskin & Hall, 1979) and conceptually relevant self and interpersonal variables was examined in three investigations. Based on clinical theory and description, it was proposed that the NPI would be correlated with self-images which were positive but low in complexity and vulnerable to threat. In addition, it was hypothesized that the NPI would be associated with antagonism and hostility characteristics that should contribute to narcissists' frequently observed interpersonal difficulties. As expected, the NPI was associated with extremely positive self-images as well as low self-complexity (Study 1). High NPI scores were also associated with a self-aggrandizing attributional style (Study 1) and higher scores on hostility and antagonism (Study 2). High NPI scorers appeared to benefit the most from the perception of availabile social support during periods of high stress. The findings are discussed with regard to the construct validity of the NPI and adaptive versus maladaptive aspects of narcissistic behavior. (c) 1995 Academic Press, Inc.