1. The use of external devices, most often electronic in nature, to help a person gain conscious control over mental and bodily functions that are usually thought of as automatic and not controllable by the conscious mind, such as the pulse rate and brainwave pattern.
2. The use of instrumentation to measure the effects of various mental processes including imagery and suggestion on such biological functions as brainwave patterns, finger temperature, and galvanic skin response.
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Tarot Journal and Coloring Book, by Jake Baddeley (Book Cover Design)
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