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Zener ESP cards, designed in the 1930's by Karn Zener 1903-1963 for use in extra sensory perception ESP experiments. A deck of Zener cards consists of five each of the five different cards.
© age fotostock / SuperStock
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Image Keywords: card, cards, color, colour, deck, decks, ESP, experiment, experimental, experimentation, experimenting, experiments, extra, perception, sensory, Telepathy
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Contemporary
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