5 Replies to “Where Did the Dots Go?”

  1. I don’t see the illusion: no matter what I do, I see three dots. I spent a couple of hours staring at this a few years ago, and the dots just stay there. Drove my dinner companions nuts. I often can’t see visual illusions.

  2. Austrlia’s ABC network had a show (Catalyst) about this illusion about a year ago:
    http://www.abc.net.au/catalyst/stories/s1063853.htm
    “[…] Each time all three dots re-appear, tick the paper […]
    Scores
    * If you scored between 4 and 6, your brain switch rate is average.
    * If you scored more than 6, your brains switch rate is fast, like a dancer.
    * If you scored less than 4, your brain switch rate is slow, like a mathematicians.”

  3. That quote from the Australian ABC network is awesome. Totally awesome. Apparently Michael Nielsen is a mathematician!
    I think I’m going to start a company which, instead of asking logic puzzles as part of its hiring process, simply asks about this optical illusion. If you score less than 4, you get the job.

  4. Given the explanation they offer (that the dots disappear because of the “ascendancy” of the left hemisphere over the right), I wonder if left-handers (whose right hemisphere is more dominant) are less likely to see the illusion than right-handers? My only data point is that I’m left-handed, and could barely make the yellow dots flicker after staring for a few minutes.

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