inquiry. This is the first book to provide a broad scientific point of view for the investigation of a variety of special states of consciousness. The editor combines a humanistic approach, which includes an awareness of the great potential richness in human experience indicated by ASCs, with the disciplined precision of a scientist. He brings a professional point of view to the observation of the increasingly widespread use and resultant effects of drug, Yoga, self-hypnosis, and other means of producing ASCs which are popularly regarded as comprising either a major social problem or a sign of positive change in a materialistic civilization. Studies of ASCs produced by psychedlic drugs, for example, are placed in this book within a broad, illuminating perspective that includes papers on mystical experiences, hypnagogic (between waking and sleeping) states, dream consciousness, meditation, hypnosis, and brain wave feedback-produced states. In this volume, Professor Tart has brought together 35 scientific papers which illustrate the variety of ASCs and their effects, which describe some of the techniques, both ancient and modern, for producing ASCs and, perhaps most important, which show that ASCs can be studied scientifically without destroying their inherent human richness.

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