Offhand, the only thing I can remember canon Hermione saying about the theory of thinking is the bit where she explains that she remembers more than most people because she pays attention to what she perceives.

This seems subjectively plausible to me, though it might be hindsight bias-- that is, sometimes when I don't remember things after first exposure, the trying to remember them just brings up a fog as though those things were never noticed, even though in some cases, I know I was paying some degree of attention. It's just that whatever it was didn't get moved from short-term attention into memory.