Sandrine Ceurstemont, editor, New Scientist TV
Think this animated man is running to the left? Switch your point of view and you may change your mind.
Created by Steven Thurman and Hongjing Lu from the University of California, Los Angeles, the animation is most commonly seen as a man running to the left when viewed directly. But by fixing your eyes on the red cross so that it appears in your peripheral vision, the man seems to move to the right.
According to the researchers, they manipulated the animation to induce the switch by adjusting features of the discs making up the man's body. Their orientation and drifting speed represent what our brain would expect from a person walking to the right.
The illusion was one of the finalists in this year's Best Illusion of the Year Contest.
If you enjoyed this post, check out a Pac-Man effect that creates phantom shapes or watch how motion in Super Mario land can be deceptive.
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