Extrarelationship Involvement Among Heterosexual Males: An Explanation Based on the Theory of Planned Behavior, Relationship Quality, and Past Behavior

The present study investigated the reasons why males in relationships engage in extrarelationship involvements (ERls). The theory of planned behavior was used as the basis for a decision-making model for ERI. The contribution of relationship factors and past behavior to explain ERI was also investigated. A division of perceived behavioral control into individual components of self-efficacy, control, and planning was also tested. Different sets of factors were associated with intention and behavior. ERI intentions were predicted by attitudes toward ERI, planning, game-playing love, and positive experience of past ERI. Present ERI behavior was predicted by ERI behavior in the past 6 months. Results generally supported the theory of planned behavior, especially for the prediction of intention.