[jonahrd]

That is the point of the study, but in my non-scientific opinion it seems like a very poorly crafted study.

Nobody is going to have issues with attention/motivation during the one, short task they were assigned at some study. It's a very novel, motivating environment.

And then of course if you're feeling the effects of a new drug, you'll be "off" a bit.

This doesn't really prove anything about kids who take it for a few nights during exam week to study.