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Think about what it means to be biased. What it means for a selection process to be biased against applicants of type x is that it's harder for them to make it through. Which means applicants of type x have to be better to get selected than applicants not of type x. [1] Which means applicants of type x who do make it through the selection process will outperform other successful applicants. And if the performance of all the successful applicants is measured, you'll know if they do.

Of course, the test you use to measure performance must be a valid one. And in particular it must not be invalidated by the bias you're trying to measure. But there are some domains where performance can be measured, and in those detecting bias is straightforward. Want to know if the selection process was biased against some type of applicant? Check whether they outperform the others. This is not just a heuristic for detecting bias. It's what bias means.







The problem is that there seem to be no such tests. The performance of academics is typically evaluated by very subjective parameters, such as citation indexes.
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melian
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You could run into problems because of different distributions. If group A and B both have a mean score of zero, but A has a standard deviation of one and B has a standard deviation of two, and you filter out everyone with a negative score, then the people in group B that pass score twice as high as the people in group A, even though there was no bias.
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DanielLC
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