This is so cool. Since I figure that nobody actually builds and uses a spinner when answering the question (I certainly didn't), does it show that we are tremendously accurate at randomizing?
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I've done a series of these questions over the years and it's a bit less accurate than it might seem, especially if you start getting into narrower numbers (e.g, 5/95%) or more than 2 colors
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neat -- it would be very interesting to really quantify what works and what doesn't. (Congrats on such a clever series of studies!)
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do the answers to other values (say 70/30) typically converge to 80/20 as well?
Imagine repeating an experiment over and over again until you get a result that is improbably good. Then people only retweet the one unusually good random outcome.
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I read a study once about how a very large container was filled with marbles and 1000 people were asked to guess how many were in it. The mean of the 1000 guesses was closer to the actual number than any single guess.