https://sciencebasedmedicine.org/psychological-placebos/
"A thorough understanding of placebo effects is critical to the science of medicine, and to understanding how objectively worthless interventions can become so popular. A recent https://www.nature.com/articles/s41598-018-37945-1 presents a series of experiments that take a look at psychological placebos, where the intervention is not medical, but purely psychological. The results are not surprising, but they are instructive for both practitioners and researchers."
