In Rusbult’s investment model of romantic commitment, satisfaction and investment correlates with commitment within a romantic relationship. Thus, it can predict the stability of relationships, and even friendships, as the author predicts. The only difference between a romantic relationship and a friendship is that they aren’t exclusive. Individuals can have multiple friends but only one romantic partner (not including polyamory relationships). 

The researchers applied Rusbult’s model onto adolescent best friendships to predict their friendship stability. After analyzing data from adolescent boys and girls of both stable and nonstable friendships, the model was proven to be applicable in friendships and predictive abilities of stability. The better friendship stability, the higher levels of satisfaction, investments, and commitment there would be! These variables are also more important for girls than boys. 

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Ashley Bejar, UConn KIDS Research Assistant 

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