Validation of two scales for narcissistic personality disorder.

The many theoretical accounts of narcissistic personality disorder (NPD) provide no widely accepted method of identifying persons having this syndrome. Undergraduate scores on the Narcissistic Personality Inventory (NPI) and the Millon Clinical Multiaxial Inventory (MCMI) Narcissistic scale were intercorrelated and were also correlated with the Marlowe-Crowne Social Desirability Scale (MCSDS). NPI and the MCMI subtests correlated significantly with each other, r(146) = .55, p less than .001, but not with the MCSDS. These results further the search for a reliable, valid, and easily administered test for NPD while leaving open the question of the relationship between this syndrome and concern with self-presentation.