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 engag e in extrarelationship involvements (ERIs). 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 investig ated. 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 p redicted 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 beh avior, especially for the prediction of intention.