Magicians have a long history of exposing the fraudulent methods of mediumship. Early debunkers included Chung Ling Soo, Henry Evans and Julien Proskauer.[62] Later magicians to reveal fraud were Joseph Dunninger, Harry Houdini and Joseph Rinn. Rose Mackenberg, a private investigator who worked with Houdini during the 1920s, was among the most prominent debunkers of psychic fraud during the mid-20th century.[63] https://drive.google.com/file/d/16K4qFAF6q61QlZP1cN9QJhwSB3OgzOIw/view?usp=sharing
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The British medium William Roy earned over £50,000 from his séance sitters. He confessed to fraud in 1958 revealing the microphone and trick-apparatus that he had used.[169] The automatic writings of the Irish medium Geraldine Cummins were analyzed by psychical researchers in the 1960s and they revealed that she worked as a cataloguer at the National Library of Ireland and took information from various books that would appear in her automatic writings about ancient history.[170] https://drive.google.com/file/d/1j9OXTL0I-NYzWv7GGPZjWvnWCNACHJFh/view?usp=sharing


In 1970 two psychical researchers investigated the direct-voice medium Leslie Flint and found that all the "spirit" voices in his séance sounded exactly like himself and attributed his mediumship to "second-rate ventriloquism".[173] The medium Arthur Ford died leaving specific instructions that all of his files should be burned. In 1971 after his death, psychical researchers discovered his files but instead of burning them they were examined and discovered to be filled with obituaries, newspaper articles and other information, which enabled Ford to research his séance sitters backgrounds.[174]
Astral projection Astrology Aura Bilocation Clairvoyance Close encounter Cold spot Conjuration Cryptozoology Demonic possession Demonology Ectoplasm Electronic voice phenomenon Exorcism Extrasensory perception Forteana Ghost hunting Indigo children Magic Mediumship Occult Orb Paranormal fiction Paranormal television Precognition Preternatural Psychic Psychic reading Psychokinesis Psychometry Remote viewing Retrocognition Spirit photography Spirit possession Spirit world Spiritualism Stone Tape Supernatural Telepathy Ufology
Senses used by mental mediums are sometimes defined differently from in other paranormal fields. A medium is said to have psychic abilities but not all psychics function as mediums. The term clairvoyance, for instance, may include seeing spirit and visions instilled by the spirit world. The Parapsychological Association defines "clairvoyance" as information derived directly from an external physical source.[37]