No interest in gaming the test, to make himself look better to grown-ups. Obviously short attention span. And no filter on his emotions. (Which is not to say

No interest in gaming the test, to make himself look better to grown-ups. Obviously short attention span. And no filter on his emotions. (Which is not to say that it's wrong. Unless you're at serious risk of starvation, a marshmallow is only a feeble token reward.)