Five times as much positive interaction as negative

Many Little Things That Make You Happy are Better Than A Few Big Ones

Because of the disproportionate weight of the negative, balance does not mean a 50-50 equilibrium. Researchers…have found that a very specific ratio exists between the amount of positivity and negativity required to make married life satisfying to both partners. That magic ratio is five to one. As long as there was five times as much positive feeling and interaction between husband and wife as there was negative, researchers found, the marriage was likely to be stable over time. In contrast, those couples who were heading for divorce were doing far too little on the positive side to compensate for the growing negativity between them.