Hedge’s G

Steve Simon


Someone asked me today about Hedge’s G. I had never heard of it before, but if you do a web search, you will find

which defines it as a variation on Cohen’s D that corrects for biases due to small sample sizes. The formula for Cohen’s D is well known:

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and you adjust this value to get Hedge’s G with the formula:

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You can find an earlier version of this page on my original website.