The Psi Encyclopedia is a collection of articles and case studies about psi research, the scientific investigation of psychic phenomena. It's a work in progress, being created by the Society for Psychical Research in London. Learn more >

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Nineteenth century apparition case, frequently cited, in which the apparition of a living woman was perceived by two people, who both in turn were perceived by the woman herself. 

English chartered surveyor and amateur conjuror (1910-1991), author of controversial books attacking deceased psychics and researchers.

Theodore Besterman (1904-1976) was an author, translator and psychical researcher, who investigated mediums and wrote books and articles on paranormal topics.

British parapsychologist (d 1989) who carried out statistical experiments in ESP and psychokinesis, often in collaboration with his wife Betty Humphrey.

Clinical psychologist and author based at the Monroe Institute, noted for psychokinesis training programs carried out over two decades in Las Vegas casinos.