Link: https://slatestarcodex.com/2019/11/20/book-review-all-therapy-books/

I.

All therapy books start with a claim that their form of therapy will change everything. Previous forms of therapy have required years or even decades to produce ambiguous results. Our form of therapy can produce total transformation in five to ten sessions! Previous forms of therapy have only helped ameliorate the stress of symptoms. Our form of therapy destroys symptoms at the root!

All psychotherapy books bring up the Dodo Bird Verdict – the observation, confirmed in study after study, that all psychotherapies are about equally good, and the only things that matters are "nonspecific factors" like how much patients like their therapist. Some people might think this suggests our form of therapy will only be about as good as other forms. This, all therapy books agree, would be a foolish and perverse interpretation of these findings. The correct interpretation is that all previous forms of therapy must be equally wrong. The only reason they ever produce good results at all is because sometimes therapists accidentally stumble into using our form of therapy, without even knowing it. Since every form of therapy is about equally likely to stumble into using our form of therapy, every other form is equally good. But now that our form of therapy has been formalized and written up, there is no longer any need to stumble blindly! Everyone can just use our form of therapy all the time, for everything! Nobody has ever done a study of our form of therapy. But when they do, it's going to be amazing! Nobody has even invented numbers high enough to express how big the effect size of our form of therapy is going to be!