Contrast this with advertisement, which actually does work even when people know that it is ads, and which still does work on people how know how ads work. Als

Contrast this with advertisement, which actually does work even when people know that it is ads, and which still does work on people how know how ads work. Also, contrast this with psychotherapy, which usually does work even better if the patient understands how it works, because it enables them to become an active and more effective part of the therapy.