DS was younger when he was first tested, 3.5, but I was in the room observing and he was smirking and giving incorrect answers on purpose. There were some multiple choice questions and he pointed at things randomly without even considering the answer choices. For him, I think it was a defense mechanism because he hates being put on the spot or quizzed, and he was even worse back then. He is sensitive and can be perfectionistic so he probably figured it was better to not try at all than to try and get things wrong. He did do well with the non-verbal section, probably because that was more engaging to him and less threatening than needing to give verbal answers (being "quizzed" so to speak).
