Abstract Two forms of narcissism were found to be associated with various personality traits. Grandiose narcissism typically correlates with high levels of extraversion, openness and emotional stability, whereas vulnerable narcissism correlates positively with neuroticism and negatively with extraversion. Both types of narcissism are associated with disagreeableness. Studies revealed that narcissists, at least grandiose ones, exhibit distorted self-views. Thus, a question about potential response bias of narcissistic individuals on self-report measures seems relevant. The current study assessed measurement invariance in the five-factor model scale across groups with low and high narcissism, separately for vulnerable and grandiose type. From a larger sample (n = 755) extreme groups were selected basing on the respective narcissism scale. The results indicated that the Big Five questionnaire was measurement invariant across narcissism groups with respect to configural and metric equivalence; however, it showed a lack of scalar (intercept) invariance. Individuals scoring high on grandiose narcissism exhibited higher thresholds on extraversion, emotional stability, conscientiousness and intellect in comparison to people with a low level of grandiose narcissism. Individuals with a high level of vulnerable narcissism obtained lower intercepts on all scales, besides intellect, in comparison to individuals low in vulnerable narcissism.
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