, Volume 44, Issue 4, pp 315–322 | Cite as

Psi experiments: Do the best parapsychological experiments justify the claims for psi?

  • R. Hyman
Multi-author Review Investigating the Paranormal


Since the founding of the Society of Psychical Research in 1982, psychical researchers have, in each generation, generated research reports which they believed justified the existence of paranormal phenomena. Throughout this period the scientific establishment has either rejected or ignored such claims. The parapsychologists, with some justification, complained that their claims were being rejected without the benefit of a fair hearing. This paper asks the question of how well the best contemporary evidence for psi — the term used to designate ESP and psychokinetic phenomena — stands up to fair and unbiased appraisal. The results of the scrutiny of the three most widely heralded programs of research — the remote viewing experiments, the psi ganzfeld research, and the work with random number generators — indicates that parapsychological research falls short of the professed standards of the field. In particular, the available reports indicate that randomization is often inadequate, multiple statistical testing without adjustment for significance levels is prevalent, possibilities for sensory leakage are not uniformly prevented, errors in use of statistical tests are much too common, and documentation is typically inadequate. Although the responsible critic cannot argue that these observed departures from optimal experimental procedures have been the sole cause of the reported findings, it is reasonable to demand that the parapsychologists produce consistently significant findings from experiments that are methodologically adequate before their claims are taken seriously.

Key words

Parapsychology remote viewing ganzfeld RNG PK 


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  1. 1.
    Akers, C., Methodological criticisms of parapsychology, in: Advances in Parapsychological Research, vol. 4. Ed. S. Krippner. Mc-Farland, Jefferson, N.C. 1984.Google Scholar
  2. 2.
    Hansel, C. E. M., ESP and parapsychology: A critical re-evaluation. Prometheus Books, Buffalo, N.Y. 1980.Google Scholar
  3. 3.
    Honorton, C., Meta-analysis of psi ganzfeld research: a response to Hyman. J. Parapsychol.49 (1985) 351–364.Google Scholar
  4. 4.
    Hyman, R., The ganzfeld psi experiment: a critical appraisal. J. Parapsychol.49 (1985) 3–49.Google Scholar
  5. 5.
    Hyman, R., A critical historical overview of parapsychology, in: A Skeptic's Handbook of Parapsychology, pp.3–96. Ed. P. Kurtz. Prometheus Books, Buffalo, N. Y. 1985.Google Scholar
  6. 6.
    Hyman, R., and Honorton, C., A joint communique: the psi ganzfeld controversy. J. Parapsychol.50 (1986) 351–364.Google Scholar
  7. 7.
    Kennedy, J. E., Methodological problems in free-response ESP experiments. J. Am. Soc. psych. Res.73 (1979) 1–15.Google Scholar
  8. 8.
    Marks, D. F., and Kamman, R., Information transmission in remote viewing. Nature274 (1978) 680–681.Google Scholar
  9. 9.
    Marks, D. F., Investigating the paranormal. Nature320 (1986) 119–124.Google Scholar
  10. 10.
    May, E. C., Humphrey, B. S., and Hubbard, G. S., Electronic System Perturbation, Techniques. SRI International (Final Report) Menlo Park, CA 1980.Google Scholar
  11. 11.
    Nelson, R. D., Dunne B. J., and Jahn, R. G., An REG experiment with large data base capability, III: Operator related anomalies. Technical Note PEAR 84003, Princeton Engineering Anomalies Research, Princeton University 1984.Google Scholar
  12. 12.
    Palmer, J., In defense of parapsychology: a reply to James E. Alcock. Zetetic Scholar (1983) 39–70.Google Scholar
  13. 13.
    Radin, D. I., May, E. C., and Thomson, M. J., Psi experiments with random number generators: meta-analysis part 1. SRI International, Menlo Park, CA 1985.Google Scholar
  14. 14.
    Schmidt, H., A PK test with electronic equipment. J. Parapsych.34 (1970) 175–181.Google Scholar
  15. 15.
    Targ, R., and Puthoff, H. E., Information transmission under conditions of sensory shielding. Nature252 (1974) 602–607.Google Scholar
  16. 16.
    The Society for Psychical Research: objects of the society. Proc. Soc. psych. Res.1 (1882–83) 3–6.Google Scholar

Copyright information

© Birkhäuser Verlag 1988

Authors and Affiliations

  • R. Hyman
    • 1
  1. 1.Department of PsychologyUniversity of OregonEugeneUSA

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