Zener cards

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References

  • Cox, W. S. "An Experiment on Extra-sensory Perception." Journal of Experimental Psychology 19.4 (1936): 429-37. Print.
  • "Dr. Karl Zener, Duke Professor." The New York Times 28 Sept. 1964: 29. The New York Times. The New York Times Company. Web. 21 July 2016.
  • Kennedy, John L. "The Visual Cues from the Backs of the ESP Cards." The Journal of Psychology 6.1 (1938): 149-53. Print.
  • Price, H. H. "Some Philosophical Questions about Telepathy and Clairvoyance." Philosophy 15.60 (1940): 363-85. Print.
  • Willoughby, R. R. "Prerequisites for a Clairvoyance Hypothesis." Journal of Applied Psychology 19.5 (1935): 543-50. Print.