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Machiavellianism in long-term relationships: Competition, mate retention and sexual coercion.

Machiavellianism is characterized by a manipulative interpersonal style and willingness to exploit others (Christie & Geis, 1970). Though previous research has focused on the influence of Machiavellianism in short-term relationships, Machiavellianism may also influence behavior within long-term committed romantic relationships. Heterosexual men (N = 93) and women (N = 141) in current romantic relationships of at least 12 months duration were recruited online. Participants completed Machiavellianism, Intra-Sexual Competition, Mate Retention and Sexual Coercion scales. Regression analyses revealed that those with high levels of Machiavellianism were more likely to compete with same-sex rivals, directly guard a mate and employ inter-sexual or intra-sexual negative inducements as a form of mate retention than those with low levels of the personality trait. Gender did not moderate the influence of Machiavellianism on these behaviors. Findings highlight the influence of Machiavellianism within long-term committed romantic relationships.