A brain wave with a frequency of between 14 and 50 cycles per second, related to relaxation and dream states. Through biofeedback machines, subjects can learn to produce alpha waves and induce altered states of consciousness. During the 1970s, many thought alpha waves to be especially associated with ESP and worked on producing them as a means of assisting people with psychic development. Today, that enthusiasm has waned.
Lawrence, Jodi. Alpha Brain Waves. New York: Avon, 1972.
Stern, Jess. The Power of Alpha Thinking: Miracle of the Mind. New York: William Morrow, 1976.
Tart, Charles T. States of Consciousness. New York: E. P. Dutton, 1975.