On 4 February 1922, Harry Price with James Seymour, Eric Dingwall and William S. Marriott had proven the spirit photographer William Hope was a fraud during tests at the British College of Psychic Science. Price wrote in his SPR report "William Hope has been found guilty of deliberately substituting his own plates for those of a sitter... It implies that the medium brings to the sitting a duplicate slide and faked plates for fraudulent purposes." The medium Kathleen Goligher was investigated by the physicist Edmund Edward Fournier d'Albe. On July 22, 1921 in a séance he observed Goligher holding the table up with her foot. He also discovered that her ectoplasm was made of muslin. During a séance d'Albe observed white muslin between Goligher's feet.
In 1876, William Eglinton was exposed as a fraud when the psychical researcher Thomas Colley seized a "spirit" materialization in his séance and cut off a portion of its cloak. It was discovered that the cut piece matched a cloth found in Eglinton's suitcase. Colley also pulled the beard off the materialization and it was revealed to be a fake, the same as another one found in the suitcase of Eglinton. In 1880 in a séance a spirit named "Yohlande" materialized, a sitter grabbed it and was revealed to be the medium Mme. d'Esperance herself.
In 1966 the son of Bishop Pike committed suicide. After his death, Pike contacted the British medium Ena Twigg for a series of séances and she claimed to have communicated with his son. Although Twigg denied formerly knowing anything about Pike and his son, the magician John Booth discovered that Twigg had already known information about the Pike family before the séances. Twigg had belonged to the same denomination of Bishop Pike, he had preached at a cathedral in Kent and she had known information about him and his deceased son from newspapers.
Direct voice communication is the claim that spirits speak independently of the medium, who facilitates the phenomenon rather than produces it. The role of the medium is to make the connection between the physical and spirit worlds. Trumpets are often utilised to amplify the signal, and directed voice mediums are sometimes known as "trumpet mediums". This form of mediumship also permits the medium to participate in the discourse during séances, since the medium's voice is not required by the spirit to communicate. Leslie Flint was one of the best known exponents of this form of mediumship.
^ "Glossary of Key Words Frequently Used in Parapsychology" Archived 2010-12-24 at the Wayback Machine, Parapsychological Association website. "Materialization: A phenomenon of physical mediumship in which living entities or inanimate objects are caused to take form, sometimes from ectoplasm." Retrieved January 24, 2006 "Medium – Definition". Dictionary.com. Retrieved 23 March 2007.