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| In an animated version of this image, the rotation of the whole ring obscures the changing colors of the dots. See below for the video. CREDIT: Jordan Suchow and George Alvarez of Harvard University |
A mysterious illusion that illustrates how motion can render color changes invisible won the “Best Illusion of the Year” for 2011, and it also taught researchers something they didn’t know.
“It is a really beautiful effect, revealing something about how our visual system works that we didn’t know before,” said Daniel Simons, a professor at the University of Illinois
, Champaign-Urbana. Simons studies visual cognition, and did not work on this illusion. Before its creation, scientists didn’t know that motion had this effect on perception, Simons said. [Eye Tricks: Gallery of Visual Illusions]
A viewer stares at a speck at the center of a ring of colored dots, which continuously change color. When the ring begins to rotate around the speck, the color changes appear to stop. But this is an illusion. For some reason, the motion causes our visual system to ignore the color changes. (You can, however, see the color changes if you follow the rotating circles with your eyes.) [See Video of Illusion Winner]
To read more go to: http://www.livescience.com/14097-visual-illusion-contest-motion-perception-change-blindness.html