Y middle child threw the coding section of her first iq test, I'd say either because it hurt or was utterly boring, not for any more complex reason... Weirdly the psychologist didn't se to think it was odd or a problem that she did each item precisely twice (perfectly) then put down her pencil and watched the clock and could not be swayed to get going again. When I raised it as an issue she said DD was anxious (seriously? She was sure enough she'd done each item right twice, proving mastery and so could stop now, and you interpret that as anxiety? Smug maybe? Smart enough to know the test is boring?)....