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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American direct voice medium (1874-1947), noted in particular for a variety of foreign languages heard during sittings, but viewed with suspicion by some investigators.

Nobel prize-winning British physicist who had a long-standing interest in paranormal phenomena, notably claims by mediums to produce psychokinetic effects.

Nineteenth-century rationalist debating club notable for its 1871 report of an investigation that conclusively established certain claims of psychokinetic phenomena as genuine.

Marc Wittmann is a cognitive neuroscientist based in Freiburg, Germany, where he conducts research on time perception and psi phenomena.

Jacobo Grinberg-Zylberbaum (1946-?) was a Mexican psychologist and consciousness researcher who carried out experiments in telepathy and extraocular vision.