Given that it is a clinical trial with random assignment, and assuming that compliance was not a major issue, I think we can assume this is not about pre-existi

Given that it is a clinical trial with random assignment, and assuming that compliance was not a major issue, I think we can assume this is not about pre-existing tendencies toward self-help leadership styles. However, I suppose there could be something to what you are saying, as in 'look the part, be the part.' If I were to speculate I'd suppose that exposure to the hot and cold elements expands the sensory experience, and expanded sensory experiences often stimulate the brain and its capacity to adapt.