Published by
InternJack
on
Tuesday, November 17, 2015
Last Updated: Thursday, November 19, 2015
A special deck of cards, developed by perceptual psychologist Karl Zener for use by J. B. Rhine in tests of extrasensory perception : a standard pack contains 25 cards, each portraying one of five symbols — circle, cross, square, star or wavy lines. ...
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