How to Identify Narcissism With 13 Items? Validation of the German Narcissistic Personality Inventory-13 (G-NPI-13)

Four studies investigated the construct validity of the brief version of the German Narcissistic Personality Inventory-13 (G-NPI-13). Study 1 ( N = 603) confirmed the three-factor structure of the G-NPI-13 and its associations with the NPI-40 and the NPI-16. In Study 2 ( N = 438), the convergent and discriminant validity of the G-NPI-13 was analyzed by investigating its relationships with the "Big Five," self-esteem, and mental health variables (depression, anxiety, stress symptoms; life satisfaction, happiness, social support). Study 3 ( N = 118) provided further support for the convergence between the G-NPI-13 and the NPI-40 by investigating their associations with vulnerable narcissism, self-monitoring, and mental health. In Study 4 ( N = 82), the 1-year test-retest reliability (three measurement time points) of the G-NPI-13 was investigated. Taken together, the G-NPI-13 is a valid, reliable, and economical instrument for measuring the personality trait narcissism. Possible practical applications and limitations of the G-NPI-13 are discussed.