@zarro8767,
Are you asking about MCAT or other similar tests? You figure the exam readers differ?
I was an exam reader for a while on landscape architecture tests in a U.S. state.
There were plenty of people above me re decision making, and well they should have been. People at my level threshed out the imbecilic. I did grade on higher matters within my expertise. I know those were reviewed.
Why do you ask?