I would just think that since there are so many protocols intended to stabilize the results, that there would need to be some kind of an IQ screen in order to identify someone whose results might be skewed by exceptional IQ. I understand the difficulty with answering those kinds of questions. I don't see it so much as 'over thinking,' but rather as seeing everything through a prism. I've never had my IQ tested, but I see everything from multiple angles simultaneously, and it drives me nuts trying to fit that prism into yes/no - true/false or even multiple choice. I can always see why each of them could be right.