I've learned something new about 'me'. Apparently, I dissociate during exams. Problematic because I do not dissociate during classes, homework, studying, and practise exams. In other words, the part of me that has a shot at giving the right answers on a test, tunes out during a test.
I'd suggest that all my parts actively study for tests, but I have one part who is not up for that, and even if we all wanted ...