Jasna Hudek-Knezevic

Objective: The current study investigated actor and partner effects and the effects of (dis)similarity in the dark triad traits on self‐reported relationship satisfaction of both members of romantic couples. We examined these effects on actual similarity, similarity of perception, and men's and women's perceived similarity.Methods: On the sample of 205 heterosexual romantic couples, we administered questionnaires for measuring self‐reported and partner‐reported psychopathy, Machiavellianism, and narcissism, as well as self‐reported relationship satisfaction. For analyzing data, we used dyadic response surface analysis.Results: The results corroborated our hypotheses that the dark triad traits exerted mainly negative actor and partner effects on both partners' relationship satisfaction. The effects of (dis)similarity were obtained for psychopathy and narcissism. Dissimilarity in psychopathy was related to lower men's relationship satisfaction. Dissimilarity in narcissism was related to lower, whereas similarity in this trait to higher relationship satisfaction of both partners. Generally, our findings were similar across methods and sources of assessment.Conclusion: The results suggest that the DT traits of both members of a romantic couple matter for judgments of their relationship satisfaction and that along with actor and partner effects, the effects of (dis)similarity in psychopathy and narcissism also contribute to their relationship satisfaction.

Mate poaching is “behavior intended to attract someone who is already in a romantic relationship.” We investigated actor and partner effects of the five-factor personality traits and the dark triad traits on several mate poaching experiences. We used actor-partner interdependence modeling with data secured from both members of 187 heterosexual married, cohabiting and dating couples from Croatia. In a round-robin design, each participant rated their own and their partner’s personality traits, and their own poaching experiences. The results showed that men’s lower agreeableness had the most consistent relationship with poaching experiences in both men (actor effects) and women (partner effects). The role of other personality traits from the five-factor model was limited to specific aspects of poaching. Regarding the dark triad traits, men’s psychopathy and Machiavellianism were the most consistently related to poaching experiences in both men and women, whereas narcissism did not demonstrate a consistent actor or partner effect on poaching. The results showed that men’s poaching is associated with their own personality traits, whereas women’s poaching with their own and their partner’s personality traits. We interpret the results in the context of life history theory and mate switching hypothesis.

The growing evidence show that romantic partners’ personality traits mutually influence each other’s health. The research on relationship between personality and health behaviours should include bo...

Studies investigating the effects of emotion regulation on romantic partners’ relationship satisfaction (RS) found that proneness to use cognitive reappraisal exerts positive, whereas expressive suppression negative effects on both one’s own and partner’s satisfaction. However, no studies explored the effects of partner reported use of the two emotion regulation strategies on RS, which might allow the exclusion of method-related explanations of the previous findings and offer new insights into the mechanisms involved. We tested the hypotheses about the effects of reappraisal and suppression on RS on a sample of 205 romantic couples by using round-robin design and actor-partner interdependence modelling (APIM). Although the effects were relatively small, they were still in line with the assumptions that cognitive reappraisal has positive intra- and interpersonal effects on RS, that they can be generalized across self- and partner reports to a certain extent, and that they are somewhat stronger in women. Considering expressive suppression, only women’s self-reported suppression exerted significant negative intrapersonal effect on RS. Implications of self- and partner reports of emotion regulation for the understanding of the mechanisms mediating its effects on RS are discussed.

By using actor–partner interdependence modeling (APIM), we examined the effects of the Dark Triad traits, psychopathy, narcissism, and Machiavellianism on two mate retention (MR) domains, cost-inflicting (C-I B) and benefit-provisioning behaviors (B-P B) as well as overall mate retention (OMR) on the sample of 100 heterosexual romantic couples. These effects were examined first without and then with the control of the overlap between the traits. The results show that actor effects of the Dark Triad traits on MR were stronger in men, and regarding partner effects, the Dark Triad traits in men exerted more frequent MR in women than women’s Dark Triad traits in men. In line with our prediction, psychopathy had the strongest actor and partner effects on MR behaviors, both in men and women. Considering MR domains, we found actor effects on C-I B only in men, whereas actor effects on B-P B in both men and women. The Dark Triad traits, especially in men, exerted stronger partner effects on C-I B than on B-P B domain. Almost all actor and partner effects of psychopathy and narcissism remained significant after the control for the overlap between the traits, whereas all actor effects of Machiavellianism became nonsignificant. In both sets of analyses, without and with the control for the overlap between these traits, the most frequent plausible dyadic patterns were actor-only and couple pattern.