Hm, in that case, where does the research bias come from? What's the selection procedure for test subjects? Why does under-represent dark-skinned people? "Raci

Hm, in that case, where does the research bias come from? What's the selection procedure for test subjects? Why does under-represent dark-skinned people? "Racism" is a word with a wide range of meanings, from deliberate discrimination based on a consciously held world view at one end of the scale to subtle unconscious prejudice at the other. By the latter meaning, racism by definition involved in the causality chain anywhere that a racial group is statistically underrepresented. All that being said, as a layperson, I find it perfectly possible that pulse oximeters are simply inherently more difficult to calibrate on dark skinned people. The article didn't outright say there was a systemic error in a particular direction, only that accuracy was a problem. It may be that a best-effort attempt was indeed made on an appropriate range of demographics, and this is simply a limitation of the technology. It may also be that this could be fixed with sufficient research, but racism means it's less of a priority.