> Somebody who is doesn't know the answer isn't going to be any more nervous at any of those questions in particular, but someone who does is often going to hav

> Somebody who is doesn't know the answer isn't going to be any more nervous at any of those questions in particular, but someone who does is often going to have a nervous spike as, or just before, the correct question is asked. ... or once they realize thats the intent of the questions, or when the questioner changes their tone of voice subconsciously, or when they have an intrusive thought etc.