Ebbinghaus Illusion

Estimation 25 March 2012 0 Comments

Which orange circle in the image below is bigger?

Ebbinghaus Illusion

Believe it or not, both orange circles are the same size.  The larger circles surrounding the one on the left give it the appearance than it is smaller than the one on the right (surrounded by smaller circles).  This illusion is known as the Ebbinghaus illusion as it was discovered by a German psychologist by the name of Hermann Ebbinghaus.


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