I don’t either and I make sure and tell them every time and that all it is, is a body response meter. They ask subjective questions and want objective answers.
Now, before I have to take one, I drink 4 or 5 espressos, have a cigar, and get myself all worked up inside, like the opposite of zen. They don’t even know if I’m answering the control questions truthfully, just a lot of jumping lines.
That is a good plan. I may not be able to control what happens during the questions, but I can sure as heck screw up the control questions.