This is generally true for placebos in the psychological domain. Often times a positive outlook or expectation of improvement can achieve a somewhat better outc

This is generally true for placebos in the psychological domain. Often times a positive outlook or expectation of improvement can achieve a somewhat better outcome. (One example among many: acupuncture in the domain of pain management.[1]) It is more a question of how much of an improvement one should expect, and whether placebo-sellers are exploiting their customers be setting false expectations. [1] https://www.sciencebasedmedicine.org/acupuncture-doesnt-work/ https://www.sciencebasedmedicine.org/acupuncture-doesnt-work...