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From Ancient Greek πρόσωπον (prósōpon, mask); introduced by French psychical researcher René Sudre, whose book "Parapsychology" (1926) was published in English by Grove Press in 1962.



  1. (parapsychology, rare) A sudden and profound change of an individual's personality, whether spontaneous or induced e.g. in hypnosis.
    • 1929, “Psychic research, Volume 23”, in (Please provide the book title or journal name), American Society for Psychical Research, page 381:
      Mr. Soal declares that while the presence of certain persons is favorable to his duplication of personality and while some persons actually aid the prosopopesis, others have an inhibitive influence.
    • 2011, Etzel Cardeña, Michael Winkelman, Altering Consciousness: Multidisiplinary Perspectives, ABC-CLIO, →ISBN Invalid ISBN, page 105:
      Later, French psychical researcher René Sudre (1880-1968) discussed what he referred to as prosopopesis or the nonconscious tendency to impersonate, as seen in mediumship, as well as in hypnosis, possession and cases of double and multiple personality.
    • 1975, Carl Allanmore Murchison, The case for and against psychical belief, Ayer Publishing, →ISBN Invalid ISBN, page 94:
      Walter is good-naturedly willing to be called a "secondary personality," a "hypnotic impersonation", a "mindkin" (C.D.Broad), a "prosopopesis" (Sudre) or "entelechy" (Driesch). In fact, he says, "You may call me anything but 'It'!"


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