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Item/Description: Vintage 1987 double-decks set of “Can You Believe Your Eyes? Illusions & Visual Oddities” Y & B Associates novelty educational as well as entertainment playing cards set in original box, designed by Dr. J. R. Block and Dr. Harold E. Yuker, Professors of Psychology, Hofstra University, Hempstead, N.Y.
***Set consists of two (2) decks of playing cards containing over 100 illusions and visual oddities, with the plan of the deck being as follows:
*Aces: Illusions in Color
*Kings: Color Reversal
*Queens: Ambiguous Figures
*Jacks: Impossible Figures
*Clubs: Size and Figure Distortion
*Diamonds: Depth Perception
*Hearts: Figure Ground Illusions and Unstable Figures
*Spades: Seeing What Is Not There and Not Seeing What Is
***The design of the card backs is the reverse image of the six of spades. On the back of your cards you will see small light blue dots at all of the intersections except the one you focus upon.
***These cards are part of a series of educational playing cards and other products Y & B Associates have produced
***Each deck is fifty-two (52) cards complete plus six (6) extra cards.
Age/Period: Vintage - 1987 (1980s)
Manufacturer/Identification/Markings: Package insert attribution reads “Dr. J. R. Block and Dr. Harold E. Yuker, Professors of Psychology, Hofstra University, Hempstead, N.Y., 11550 - Y & B Associates, Inc. - ‘Products that entertain and educate’ - 33 Primrose Lane, Hempstead, N.Y. 11550". This insert is a 1987 reprint of the 1984 edition.
Quantity: Two (2) decks of playing cards.
Measurements: Box - 5 & 1/4"W x 3 & 3/4"H; Cards - 3 ½”H x 2 ½”W
Condition: Both decks of cards are crisply like new and fifty-two (52) cards complete, plus six (6) extra cards.