I wonder how much of this is true for therapy in general. When I've looked into it, the evidence for cognitive behavioral therapy (CBT) is a lot less than I wou

I wonder how much of this is true for therapy in general. When I've looked into it, the evidence for cognitive behavioral therapy (CBT) is a lot less than I would have expected, and there seems to be some question about how much of its effect is due to the placebo effect. This study on microdosing makes the point that if an experiment isn't double-blind - if the researchers know what is the placebo and what isn't - than this will have an impact on the results (and they seem to think this is the reason their double-blind experiment got different results). But I'm not sure it's possible to have double blind experiments when it comes to therapy (someone correct me if I'm wrong), and would likely make many single-blind studies of therapy appear more useful.