The Narcissistic Personality Inventory 8: Validation of a Brief Measure of Narcissistic Personality.

The present study was conducted with the aim of constructing and validating a short form of the Narcissistic Personality Inventory (NPI). The NPI is the most widely-applied measure for the assessment of narcissistic personality traits and, therefore, it is of great relevance for many research questions in personality and social psychology. To develop the short scale, we first found the optimal eight-item solution among all valid combinations of the NPI-15 items in an exploratory subsample ( = 1 165) of our complete representative sample of the German general population.