> The remaining 29 participants acted as the control group and received a placebo, also with psychological support.
How do you do placebo with psychedelics? Doesn't it quickly become obvious that you are tripping (or not)?
How do you do placebo with psychedelics? Doesn't it quickly become obvious that you are tripping (or not)?
longer answer, dose-response varies, subjects don't necessarily know what the effects should be, or may not be able to identify the experience, and also it's pretty easy to get yourself into an autocthonous psychedelic headspace, especially if you expect "something" to happen