Thursday, May 12, 2011

Yes, they actually do have a "Best Illusion of the Year contest"

First watch the video, making sure to stare at the white spot in the center.

It probably looked like the dots stopped changing color when the image rotated. Now watch it again but keep you eye on one of the colored dots. See the difference?

I'll let Scientific American's James Matson provide the details:
The illusion, titled "Silencing awareness of change by background motion," won top honors May 9 at the 2011 Best Illusion of the Year contest in Naples, Fla. The event, which is in its seventh year, is an offshoot of the annual Vision Sciences Society meeting, also in Naples. Jordan Suchow, a Harvard University graduate student, and George Alvarez, an assistant professor in Harvard's psychology department, created the winning entry.

The contest draws all manner of illusory entries. The 2011 first and second runners-up were also animations, one an illusion of contrast and one an illusion of visual aftereffects induced by motion, respectively. (See all 10 finalists here.) Last year's winner, on the other hand, was a video of an actual physical object that seemed to defy gravity—balls rolled right up inclined ramps as if pulled by magnets.

For a more in-depth take on the science behind this year's winning illusion, check out a study (pdf) Suchow and Alvarez wrote in the January 25 issue of Current Biology.

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