A team of researchers from Florida State University, the University of Texas at Austin and the University of California, Los Angeles, has found that the enduring qualities of both spouses in a marriage shape behavioral interactions, which in turn predict changes in relationship satisfaction. In their paper published in Proceedings of the National Academy of Sciences, the group describes their analysis of 10 prior studies of married couples and what factors they found contribute to longer-lasting marriages.

Over the past several decades, researchers have noted that the number of divorces has been rising—current estimates suggest half of all married couples in the U.S. will wind up divorced. This trend has led researchers to study why modern marriages are failing at such a high rate. In this new effort, the researchers looked at relationship satisfaction as a marriage matures as a likely indicator of marriage success.

The work involved analyzing data from 10 prior longitudinal studies involving 1,104 couples using the Vulnerability-Stress-Adaptation model as a way to measure couple satisfaction. Participants in the longitudinal studies were asked to rate their spouses in three main ways: degree of attachment avoidance, neuroticism and attachment anxiety. Each was also asked to rate their spouse regarding how they behaved during stressful times and how engaged they were during times when problem solving was required.

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