With 90 percent accuracy, Gottman says he can predict, often after only three minutes of observation, which marriages are likely to flourish and which are likely to flounder.
The formula is that for every negative expression (a complaint, frown, put-down, expression of anger), there needs to be about five positive ones (smiles, compliments, laughter, expressions of appreciation and gratitude). Yes, as simple as that ! Stay together, make your marriage last, for the sake of your children!
Source: Dr. John Gottman at the University of Washington (2011)