Biofeedback is generally defined as the presentation to a person of ongoing biological information, such as heart rate, usually by means of meters, lights, or auditory signals, so that he or she can become aware of inside-the-skin behaviors...
In the conduct of medical research, the existence of mind/body interactions has over the years been treated as a sort of hindrance. Such interactions are often lumped under the somewhat disparaging name of the placebo response.
Back in the 1960s when experimental psychologist Neal Miller first demonstrated that the autonomic nervous system could be trained to alter some bodily processes, it was thought biofeedback would change the world. Miller's discovery uprooted the...