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James Randi Educational Foundation

An Encyclopedia of Claims, Frauds, and Hoaxes of the Occult and Supernatural

Introduction | "R" Reading | Curse of the Pharaoh | End-of-the-World Prophecies

Index | A | B | C | D | E | F | G | H | I | J | K | L | M | N | O | P | Q | R | S | T | U | V | W | Y | Z

Tenhaeff, Wilhelm (1894-1981) Chairman of the parapsychology department at Utrecht University, this cantankerous Dutch investigator had all sorts of problems getting along with his colleagues, who always suspected him of hyperbole in matters of psychic reporting. Nonetheless, he was widely published in parapsychology.
      He took as a pet the clairvoyant/police psychic and general performer Gerard Croiset (1909-1980), for whom he obtained considerable media coverage. For years, parapsychologists and general believers in psychic matters pointed to the exploits of Croiset as examples of undoubted powers, in particular his work as a police psychic. Then Dutch journalist Piet Hein Hoebens looked into the reports that Tenhaeff had made, and discovered that he had exaggerated them and in some cases had lied. There were many examples in which Tenhaeff had solved a trick method used by Croiset and had chosen not to report it.
      Tenhaeff died a few months after his protégé, revealed as a fraud.



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