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This topic has appeared in the English Wikipedia rankings 1 time. It first appeared on 2026-07-29 and was most recently seen on 2026-07-29.
The investment model of commitment, originally described by Caryl E. Rusbult, is a predictive psychological theory that aims to explain why people remain in relationships. Its tenants are based primarily on those of interdependence theory, created by Harold Kelley and John Thibaut. Interdependence theory is based on both satisfaction and dependence. One's satisfaction within a relationship is determined by the outcomes one sees in a relationship versus their comparison level, or what one expects out of a relationship. Dependence is a measure that compares the outcomes of a relationship with the outcomes possible in another relationship, or an alternative. In the case of interdependence theory, one would theoretically be able to predict whether an interaction or relationship will flourish or end poorly based on whether each person in the relationship is satisfied, and if they each believe that the situation they are currently in is superior to a relationship that they could have with an alternative. However, certain situations in which people remain in relationships cannot fully be explained by this model alone. Examples include relationships in which outside alternatives are likely better, including abusive relationships. For this reason, the investment model was theorized to further predict relationships like these.
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