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    Best Illusion. Ever.
    By Mark Changizi | September 13th 2010 12:01 PM | 5 comments | Print | E-mail | Track Comments
    About Mark

    Mark Changizi is Director of Human Cognition at 2AI, and the author of The Vision Revolution (Benbella 2009) and Harnessed: How...

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    Here’s my vote for the best illusion ever. It was created by B. Pinna, G.J. Brelstaff / Vision Research 40 (2000) 2091–2096.

    Loom your head toward, and away, from the center point. Print it out and bring to a bar, and it is even more impressive -- the paper appears to be twisting in your hands.

     
    Some other time I'll tell you my speculation for why it works. (It is a
    perceiving-the-present explanation
    .)

    -----

    Mark Changizi is Director of Human Cognition at 2AI, and the author of books such as The Vision Revolution (Benbella, 2009) and Harnessed: How Language and Music Mimicked Nature and Transformed Ape to Man (Benbella, 2011).










    Comments

    Very cool, Mark. Here's another for you. It isn't scientific in intent, but as illusions go...I like it.

    http://www.boingboing.net/2010/09/09/child-in-the-road-il.html

    Mark Changizi
    Nice. But, I'd still call the one you link to a "parlor trick," which I talk about here, as the first level of sorcery.  -Mark

    Mark Changizi
    That's what I call a parlor trick as well, or the first level of wizardry. Clever, but just ambiguity.

    This illusion, and many others (all those my general theory of illusions explain), is not due to ambiguity. Rather than seeing one of the possible scenes that could have caused the pattern of light on our eye (which is what's going on in ambiguity illusions), in this illusion what you perceive is not even consistent with the pattern of light your eye receives.
    Not bad, but have you ever seen those?
    http://www.ritsumei.ac.jp/~akitaoka/index-e.html