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were performed by parapsychologists. In 1982, Charles Honorton presented a paper at the annual convention of the Parapsychological Association that presented his summary of the results of the ganzfeld experiments up to that date. Honorton concluded that the results represented sufficient evidence to demonstrate the existence of psi. Ray Hyman, a psychologist and noted critic of parapsychology, disagreed. Hyman criticized the ganzfeld experiment papers for

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