Wundt Illusion

Estimation 19 March 2012 0 Comments

Do the red bars appear perfectly straight and parallel?

Wundt Illusion

The lines are straight and parallel.  Some viewers will perceive the lines to bow inwards due to the angles of the blue lines.  This illusion was first observed by German psychologist Wilhelm Wundt during the 19th century.  The Wundt illusion produces the opposite effect of the Hering illusion.

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