Gottman method couples therapy is based on extensive research about how stable relationships work and how unstable relationships fail. Gottman described a core triad of balance in couple relationships that includes interactive behavior, perception, and physiology. In couples who are stable and happy, there is greater positivity than negativity in both interactive behavior and perception. In addition, couples who are stable are more likely to derive a sense of calm and well-being from the relationship instead of a sense of vigilance or activation of the flight-or-fight response. The therapy aims to rebalance behavior, perception, and physiology in such a way that the couple is able to establish a stable relationship and to ultimately know how to interrupt or repair inevitable problems in the future.