The first illusion is easy, so you get several. Why the others work is a mind trick. The Kanizsa Triangle illusion was first described in 1955 by an Italian psychologist named Gaetano Kanizsa. In the illusion, a white equilateral triangle can be seen in the image even though there is not actually a triangle there. The effect is caused by illusory or subject contours. According to the theory, objects that are grouped together tend to be seen as being part of a whole. We tend to ignore gaps and perceive the contour lines in order to make the image appear as a cohesive whole. This explains why the others work.
Posted on: Sun, 27 Apr 2014 13:03:01 +0000
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