The Norwegian version of the five factor narcissism inventory for vulnerable narcissism and the grandiose narcissism subscale of indifference: Psychometric properties of the long‐ and short‐form versions

In recent years, narcissism has been reconceptualized as a multi‐dimensional feature of human psychology. The Five Factor Narcissism Inventory (FFNI) has been proposed as a measure for two distinguishable dimensions of narcissism: Vulnerable and Grandiose (Glover, Miller, Lynam, Crego & Widiger, 2012). To investigate the role that some of these factors may have in moderating responses to cues of social exclusion, implemented in a connected laboratory experiment, we translated the subscales for Vulnerable Narcissism and the Grandiose Narcissism subscale of Indifference from English into Norwegian and included them in an online survey that was used to recruit and pre‐screen participants for the laboratory experiment. In this paper, we test the psychometric properties of these translated self‐report measures, in what amounted to be a diverse sample of the Norwegian population. We perform reliability tests and confirmatory factor analysis on the long‐ and short‐form versions of FFNI Vulnerable Narcissism and the Grandiose Narcissism subscale of Indifference. We further test the criterion validity of these measures by way of correlational analyses with other theoretically relevant measures. We conclude that the Norwegian short‐form versions of FFNI Vulnerable Narcissism and Grandiose Narcissism subscale of Indifference exhibit good psychometric properties in our data and propose that the translated scales can now be used to explore these constructs in clinical and non‐clinical populations in Norway, and can be easily adapted for use in other Scandinavian countries.