In fact, I'd wager that one of an interviewer's primary goals should to find a way to fully disregard someone's interviewing skill. Search hard for questions that a sweaty super-nervous introvert would be able to do just as well as a confident natural talker. Find wording that lets you give hints / explain the question better without the interviewee going "oh no, a hint, that means i failed this step!".

I personally think this is very hard to get right, but it has to be a top prio. It's much harder (and much more valuable) than cooking up a sufficiently difficult whiteboard coding question.