The search for psychic power

For centuries both primitive and sophisticated societies have been spellbound by persons who claim to have "psychic" power. Those who present a case for the existence of extrasensory perception (ESP) - mediums, spiritualists, telepaths, clairvoyants, psychokinetics, and others - insist that their unique abilities stand outside the realm of conventional scientific evaluation; that parapsychology offers new hope for understanding the richness and diversity of the human mind and its relationship to the world. In fact, much has been done in recent years in an attempt to convince the scientific community that such phenomena are legitimate and credible.