https://slatestarcodex.com/2020/02/27/book-review-the-seven-principles-for-making-marriage-work/

I.

John Gottman is a legendary figure, and the legend is told best by John Gottman. He describes wading into the field of marital counseling as a young psychology postdoc, only to find it was a total mess:

When we began our research, the wide range of marital therapies based on conflict resolution shared a very high level of relapse. In fact, the best of this type of marital therapy, conducted by Neil Jacobson, had only a 35 to 50 percent success rate. In other words, his own studies showed that only 35 to 50 percent of couples saw a meaningful improvement in their marriages as a result of the therapy. A year later, less than half of that group — or just 18 to 25 percent of all couples who entered therapy — retained these benefits. A while ago, Consumer Reports surveyed a large sample of its members on their experience with all kinds of psychotherapists. Most therapists got very high customer-satisfaction marks—except for the marital ones, who received very poor ratings. Though this survey did not qualify as rigorous scientific research, it confirmed what most professionals in the field already knew: in the long run, marital therapy did not benefit the majority of couples.

Gottman decided the field needed statistical rigor, and that he – a former MIT math major – was exactly the guy to enforce it. He set up a model apartment in his University of Washington research center – affectionately called "the Love Lab", and invited hundreds of couples to spend a few days there – observed, videotaped, and attached to electrodes collecting information on every detail of their physiology. While at the lab, the couples went through their ordinary lives. They experienced love, hatred, romantic dinners, screaming matches, and occasionally self-transformation. Then Gottman monitored them for years, seeing who made things work and who got divorced. Did you know that if a husband fails to acknowledge his wife's feelings during an argument, there is an 81% chance it will damage the marriage? Or that 69% of marital conflicts are about long-term problems rather than specific situations? John Gottman knows all of this and much, much more.