Hi, its Ann E. Student again.
I have just found the museum of perception 
and cognition in Belgium, with some VERY
interesting demonstrations by Marielle Lange! 
After you get there, click the button on the left 
for Illusions.  Try the Mueller-Lyer illusion.
It is really neat! 
To visit a section in English, go to the museum.
To review the previous example,click here for Ch3_ex2.

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