Recent instances of corporate misconduct and examples of blatant leader self-serving behavior have rekindled interest in leader personality traits as antecedents of negative leader behavior. The current research builds upon that work, and examines the relationship between leader psychopathy and leader self-serving behavior. Moreover, we investigate whether follower self-esteem affects the occurrence of self-serving behavior in leaders with psychopathic tendencies. We predict that self-serving behaviors by psychopathic leaders are more likely to occur in the interaction with followers low in self-esteem. We first conducted an experimental study (N = 156), in which we manipulated follower self-esteem, measured leader psychopathy, and assessed their combined effect on leader self-serving behavior using an ultimatum game. We then conducted a multi-source field study (N = 124 leader–follower dyads) using questionnaires to assess leader psychopathy, follower self-esteem, and perceived leader self-serving behavior. Across both studies, we found that leader psychopathy was positively related to their self-serving behavior, but only when followers had low rather than high self-esteem. As expected, our studies showed that the degree to which (perceived) psychopathic traits of leaders are reflected in their behavior depends on the characteristics of their followers. Apparently, the behavioral expression of negative leader traits is not only a matter of the trait strength, but instead is the result of the interplay between leader and follower in a certain context.

The present study examined relations between different aspects of humor and relationship quality. Participants, 114 married or cohabiting heterosexual couples from the general community, with a mean relationship length of 22 years, completed a number of measures assessing these two themes. We expected different aspects of humor of both partners to be positively related to relationship quality. In addition, we expected partners to resemble each other with regard to the different aspects of humor, and similarity with regard to humor to be related positively to relationship quality. The hypotheses were partially confirmed. APIM analyses revealed only one significant actor and one significant partner effect of sense of humor. Partners did resemble each other with regard to sense of humor, but couple similarity with regard to sense of humor was unrelated to relationship quality.