Votes are in and we have a winner for the 2012 Best Illusion of the Year contest. Blue ribbon goes to Roger Newport and his team at Nottingham University who developed the above illusion which makes the subject temporarily believe that their hand has disappeared.
The subject places their hands under the screen are is told to make sure that their hands don’t touch the blue lines which slowly inch closer and closer. Here is what happens next…
What the volunteer doesn’t realise is that the screen isn’t projecting exactly what’s going on underneath. In order to dodge the blue lines, the volunteer will gradually move their hands outwards but the hands on the screen look fixed in place. After just 25 seconds, the volunteer has moved their hands much farther apart than they think.
Eventually, one of the hands on the screen disappears. Of course, the volunteer doesn’t really believe their hand has vanished until they reach across to feel it and become aware of the trick. The illusion is designed to simulate the loss of awareness experienced after a stroke.
Let’s all give Roger a hand.
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