Can You Believe Your Eyes?
“Can You Believe Your Eyes?” playing cards featuring visual illusions & other oddities.
“Can You Believe Your Eyes?” playing cards featuring optical illusions, ambiguous or impossible figures and other oddities, published by Y & B Associates. The cards were designed by J. R. Block and Harold E. Yuker, Professors of Psychology, Hofstra University, Hempstead, N.Y. and have novelty, educational as well as entertainment value. They explore how humans perceive visual information: optical illusions challenge the brain's visual processing system, revealing how perception can differ from reality • see the box



Above: ‘Can You Believe Your Eyes?’ playing cards designed by Drs J R Block and Harold E. Yuker, professors of Psychology, Hofstra University, Hempstead, N.Y. Wide cards dated 1984 by Y & B Associates. Available from Intercol London and various other outlets, sometimes with different boxes or double boxes. Printed in Belgium. 52 cards + 2 jokers + an extra card + a 16-page booklet. The design of the card backs is the reverse image of the six of spades.
J. R. Block and Harold E. Yuker contributed psychological research in the study of attitudes toward disabled persons. They developed the Attitudes Toward Disabled Persons (ATDP) scale, which became a widely used tool for measuring attitudes toward individuals with disabilities. See Yuker, Harold E. and others : The Measurement of Attitudes Toward Disabled Persons►

By Jon Randall
Member since May 28, 2020
From 6 or 7 years of age I enjoyed playing cards with my family, and still enjoy a variety of games today with various groups and individuals. I contribute my competitive nature to enjoying games … it’s not that I like to win, I dislike losing! I was barely 10 years old when my great Uncle left me a small collection of playing cards and that was the starting point of my collecting. The competitive streak in me helped develop me into a competitive swimmer that sent me to various places around the world, including a 6 year stint in the US, where for much of that time I was at university. I’ve always enjoyed car boots flea markets, yard sales, charity shops etc., and my eye would never miss a pack of playing cards. Even after my swimming career finished I coached at a high level for many years and continued enjoying the discovery of some great finds around the world. For decades my collection continued to grow, despite selling a portion of it via eBay over the years. It wasn’t until post 2010 that I realised, mostly due to correspondence with Australian friends, that there were so many single playing card collectors. This intrigued me. I had so many packs of cards at home that I made the bold decision to share a good number with singles collectors, and subsequently listed around 7000 for sale on eBay. That did make a dent in my collection, but there’s still around 30,000 packs taking up quite a bit of space at home. Crazy? Yes, but I’ve seen bigger hoards a few times! There’s so many I surprise myself finding packs I forgot I had when I look in a box I’d not seen in a while.
My eBay IDs if you’d like to look are “worldwide_playing_cards” & “playing_cards_world”►
Related Articles

Sea-Dog playing cards
Ships’ prows, figureheads and signal flags promoting Sea-Dog Line marine hardware.

OXO Faces of the Millennium Dinner
Twentieth-century personalities promoting a millennium dinner at the Oxo Tower in London.

Kids Fun Box playing cards
Colourful cards for children with four non-standard suits connected with the natural world.

Tangle Foot Ale
Badger Brewery Tangle Foot strong ale advertising pack.

Scientific Whist
“Scientific Whist” : standard cards with instructions for play on the faces by Chas Goodall & Son, 1...

Agent Provocateur
Branded lingerie collection in a pack of pin-up playing cards.

Nimbus playing cards
Mike Steer’s weather-themed pack with suits in four colours and backs for cardistry.

Agatha Christie and Playing Cards revisited
Agatha Christie uses card-play as a primary focus of a story, and as a way of creating plots and mot...

The Decadent Deck
Studies in the eroticism of the female body by Inge Clayton.

Historic Shakespeare
“Historic Shakespeare” playing cards featuring Shakespearean characters by Chas Goodall & Son.

Copechat Paramount Sorting System
Preserving the past: a specimen deck showcasing edge-notched cards and their ingenious sorting syste...

Heartsette by Herbert Fitch & Co, 1893
A glimpse into a busy print and design office in late Victorian London.

Rap Rummy
Rap Rummy made by Parker Brothers in 1926, only 4 years after the discovery of King Tutankhamen’s to...

German Travel Cards
A travel-themed educational deck helping American tourists visiting Germany.

Batman® playing cards
Batman playing cards published by InterCol of London 1989.

Can You Believe Your Eyes?
“Can You Believe Your Eyes?” playing cards featuring visual illusions & other oddities.
Most Popular
Our top articles from the past 28 days