To be a bit more explicit - the finding of that study was not that efficacy had gone down relative to placebos, but rather that the absolute efficacy of CBT is

To be a bit more explicit - the finding of that study was not that efficacy had gone down relative to placebos, but rather that the absolute efficacy of CBT is going down. The authors of the study actually suggest that the reason its becoming less effective is because of the opposite of your suggestion - it's going down because the placebo response is likely getting weaker in CBT (1). Which goes back to my original point about the factors that influence of efficacy of placebos - and of course, to the parent article. I think this would have been a much more productive conversation if you had just read it first before replying. (1) https://uit.no/Content/418448/The%20effect%20of%20CBT%20is%20falling.pdf https://uit.no/Content/418448/The%20effect%20of%20CBT%20is%2...