tom's comment reminded me of this, which is paraphrased from Theodore Dalrymple. It's not exactly the same thing, but I did find it interesting.

Is there yet a measurement of how biased a person behaves suitable to determining the effectiveness of debiasing techniques? It seems the key to a lot of what is discussed here is binding yourself toward data rather than just confirming to yourself what you want to believe. People who want to debias themselves will be tempted to assume that they are doing a good job at it, so it would be good if there was a method they could follow. This might sound similar to the earlier Dojo post, but that seemed far too vague, basically just hanging out with other people who are into debiasing and relying on their judgements to know if you've progressed.