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RichardKennaway comments on Bayesian probability as an approximate theory of uncertainty? - Less Wrong Discussion
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I get that too. More generally, if there are n+1 rounds and on the first round the difference in probability between red and blue is z, then the optimal probability for choosing red is 1/2 + z/2n. It has to be close to 1/2 for large n, because 1/2 is optimal for the game where z=0, and over ten rounds the loss from deviating from 1/2 after the first round dominates the gain from knowing red is initially favoured.
Sure that's not 1/2 + z/4n?
I think he meant "the difference between the probability of red and 1/2" when he said "the difference in probability between red and blue".
Er, right, something like that.
That works too.