Cognitive Daily


  1. #1 ricky
    February 20, 2007

    Interesting. Will the “vow” come up later in grad school? haha

  2. #2 Harlan
    February 20, 2007

    The probabilities in that article on blinking in group photos aren’t right. Using their numbers, the probability of anyone blinking at any one time is 250ms/10000ms, or .025. If you need them not to blink during the time the shutter is open, add that time to the smaller interval. Subtract from 1 and exponentiate by the number of people. The real formulas for a 95% chance of not getting a blink suggest you divide the number of people by 5 if you’re using a flash (1ms exposure), or by 2 or 3 if you’re taking photos in relatively dim light. The take-home is the same, but the way they calculated it was bizarre.

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