Abstract
Narcissism has been linked to several negative outcomes in romantic relationships. However, previous literature has mostly focused on grandiosity as opposed to other phenotypic expressions of narcissism. Using a daily diary design with differently-gendered romantic couples (N = 108 dyads) in an established relationship (i.e., ≥ 3 months), this research investigated the differential relations of grandiosity, entitlement, and vulnerability with outcomes linked to romantic relationship maintenance. Grandiosity was not linked to any romantic relationship outcomes. Participants with higher entitlement reported greater non-sexual jealousy and availability of alternatives. Participants with higher vulnerability reported greater non-sexual jealousy and less relationship satisfaction. This research suggests somewhat distinct nomological networks for the three narcissism dimensions.
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