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Scientists advance the art of magic with a study of Penn and Teller's 'cups and balls' illusion
Date:2/12/2013

Cognitive brain researchers have studied a magic trick filmed in magician duo Penn & Teller's theater in Las Vegas, to illuminate the neuroscience of illusion. Their results advance our understanding of how observers can be misdirected and will aid magicians as they work to improve their art.

The research team was led by Dr. Stephen Macknik, Director of the Laboratory of Behavioral Neurophysiology at Barrow Neurological Institute, in collaboration with fellow Barrow researchers Hector Rieiro and Dr. Susana Martinez-Conde, Director of the Laboratory of Visual Neuroscience. The study, titled "Perceptual elements in Penn and Teller's "Cups and Balls" magic trick" was published today, Feb 12th 2013, as part of the launch of PeerJ, a new peer reviewed open access journal in which all articles are freely available to everyone. "Cups and Balls," a magic illusion in which balls appear and disappear under the cover of cups, is one of the oldest magic tricks in history, with documented descriptions going back to Roman conjurors in 3 B.C. "But we still don't know how it really works in the brain," says Macknik, "because this is the first, long overdue, neuroscientific study of the trick."

The discovery concerns the way magicians manipulate human cognition and perception. The "Cups and Balls" trick has many variations, but the most common one uses three balls and three cups. The magician makes the balls pass through the bottom of cups, jump from cup to cup, disappear from a cup and turn up elsewhere, turn into other objects, and so on. The cups are usually opaque and the balls brightly colored. Penn & Teller's variant is performed with three opaque and then with three transparent cups. "The transparent cups mean that visual information about the loading of the balls is readily available to the brain, yet still the spectators cannot see how the trick is done!" said Martinez-Conde.

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Contact: Stephen Macknik
macknik@neuralcorrelate.com
602-406-8091
PeerJ
Source:Eurekalert

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