If she is a perfectionist there is a chance she is causing her scores to be lower because she is unsure of an answer and when she is unsure she isn't bothering to even answer. I've a daughter that is like that, I had to explain to her that when you have eliminated several answers as not being right that you should guess from the ones remaining to increase your score. At 11 I'm guessing she might not understand that concept and it could lead to lower scores.