Joe Kamiya, was one of the first researches to apply the biofeedback testing principle, to help satisfy the question; “Can man learn to control their brainwave cycles”.
His experiments in the late 1960’s proved that those could learn how to regulate their alpha brainwaves by discriminating the difference of states of consciousness with biofeedback. When the subjects described their subjective feelings of alpha brainwaves they mentioned the sense of relaxation, floating, letting go, and warmth.
Barbara Brown (1970) observed a variety of feelings in the subjects associated with different brain wave states. Beta subjects reported worry, anger, fear, frustration, tension, alertness, surprise, and hunger. A general stressful state that can be seen as sympathetic nervous system responses. Subjects in alpha resorted pleasant feelings of relaxation, tranquility, calmness. Theta was associated with feelings of restful alertness, day dreaming, uncertainty. In Delta state subject had no sense of feelings, as this is associated with sleeping and unconsciousness.
Barbara Brown conclusions were when after the subject was able to to be aware with the relationship between feeling state and brainwave activity, the biofeedback signal is no longer necessary.
Rao, K. R. (2005). Consciousness studies: Cross-cultural perspectives. McFarland.
Zafutto, A. A., & Zaffuto, M. (1975). Alpha-genics: How to use brainwaves to improve your life. Warner Paperback Library.