Earlier quoted context omitted.
> it would mean that the graders are just getting tired/lazy/inattentive the further they get in their stack of papers Or maybe they are getting better / more picky. I know in code reviews I often pass a few and then notice something that I realize was also wrong in previous reviews I allowed, but later reviews that day (week?) will not allow that.
I've participated in day-long and multi-day interview events for job candidates, and I see the same effect. At the beginning you don't have a frame of reference and you're more likely to question your own decision or give someone the benefit of the doubt, but by the end you're far more systematic, plus a little bit numb to the effect your decision is having.
It'd seemingly be more work but would result in averages that are more reasonable to the changes in stress.