/rant but I feel like talking about percentage points of difference is always hard for humans. For example: > In comparisons of men and women, there was an 8%

/rant but I feel like talking about percentage points of difference is always hard for humans. For example: > In comparisons of men and women, there was an 8% difference from demographic parity in favor of women. would have been clearer (and more correct) as "an 8 percentage-point difference from demographic parity". That 8 pp difference though is a 16% "relative" difference (58/50), or more starkly "The algorithm chose the woman almost 40% more often" (58/42 => 1.38). That said, the diagram in the post [1] is much easier for humans to parse and say "wow, that looks pretty far off!". tl;dr: A number like 8% sounds like "no big deal", but 8 percentage points (on each side) is a big deal! [1] https://cdn.cms-twdigitalassets.com/content/dam/blog-twitter/engineering/en_us/insights/2021/imagecropping/newimagecropchart.jpg.img.fullhd.medium.jpg https://cdn.cms-twdigitalassets.com/content/dam/blog-twitter...