The World of Playing Cards Logo

The English Playing Card Society

EPCS Logo

Promoting research into English card history since 1984. Members receive the EPCS magazine three times a year.

Join from £10/year

Can You Believe Your Eyes?

Published April 04, 2025 Updated April 07, 2025

“Can You Believe Your Eyes?” playing cards featuring visual illusions & other oddities.

1984 United KingdomUSAEducationPsychologyY & B Associates

“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

‘Can You Believe Your Eyes?’ playing cards published by Y & B Associates, 1984 ‘Can You Believe Your Eyes?’ playing cards published by Y & B Associates, 1984 ‘Can You Believe Your Eyes?’ playing cards published by Y & B Associates, 1984

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

avatar
33 Articles

By Jon Randall

Australia • 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

Activity for Can You Believe Your Eyes?

Sign in to comment or save this article.


Related Articles

Learning to play Cribbage

Learning to play Cribbage

I learned to pay cribbage when I was very young, aged around six or seven.

1980 Tangle Foot Ale

Tangle Foot Ale

Badger Brewery Tangle Foot strong ale advertising pack.

1985 Agent Provocateur

Agent Provocateur

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

2006 The Decadent Deck

The Decadent Deck

Studies in the eroticism of the female body by Inge Clayton.

1893 Historic Shakespeare

Historic Shakespeare

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

1925 Copechat Paramount Sorting System

Copechat Paramount Sorting System

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

1893 Heartsette by Herbert Fitch & Co, 1893

Heartsette by Herbert Fitch & Co, 1893

A glimpse into a busy print and design office in late Victorian London.

1926 Rap Rummy

Rap Rummy

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

1971 German Travel Cards

German Travel Cards

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

1989 Batman® playing cards

Batman® playing cards

Batman playing cards published by InterCol of London 1989.

1910 Pastime Playing Cards for the Blind

Pastime Playing Cards for the Blind

The “Pastime” Playing Cards for the Blind manufactured by Goodall & Son Limd., c.1910.

2003 Safety playing cards

Safety playing cards

Safety playing cards designed to reinforce the “Think and Be Safe” concept.

1967 Winstanley Geographical cards

Winstanley Geographical cards

Facsimile of Winstanley’s Geographical cards produced by Harold & Virginia Wayland, 1967.

2016 UMass Amherst Libraries

UMass Amherst Libraries

UMass Amherst Libraries playing cards, USA, 2016

2016 Ethics Education playing cards

Ethics Education playing cards

Ethics Education playing cards produced by the Centre for Military Ethics at King’s College London, ...

1988 Politipack ’88 playing cards

Politipack ’88 playing cards

Politipack ’88 produced by Robert Billingsley, USA, 1988.

1759 Aesop’s Fables

Aesop’s Fables

Aesop’s Fables playing cards by I. Kirk, c.1759.

Pantheon or Heathen Mythology

Pantheon or Heathen Mythology

Pantheon or Heathen Mythology cards for instruction of youth, c.1770.

2005 University of Essex

University of Essex

Playing Cards produced for the University of Essex during 2005-2007.

35: More Design Copies

35: More Design Copies

Here I want to take another widely copied design and see how individual variation by the copier can ...


Sign in with Google