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Sheep: Term originally used by Gertrude Schmeidler 1943) to describe a subject who does not reject the possibility that extrasensory perception could occur under the conditions of the given experimental situation; this somewhat narrow meaning has been extended to refer also, tentatively, to persons who believe that ESP exists as a genuine phenomenon, or even to persons who obtain high scores on various so-called “projective,” “scalar,” or “checklist” measures of belief in (and/or experience of) different sorts of putative psi phenomena. Compare Goat. See also Sheep-Goat Effect.


  1. Parapsychology by Michael A. Thalbourne, Republished by Puente Publications, Charlottesville, VA, USA, 2003