So I think there is the following problem with the experiment as you propose: are these low performers simply deficit in attention management or broader faculties as well. If the former, there's decades of data indicating that clinical level difficulties with attention can indeed be treated (hint: it's called ADHD). That's because ADHD is often in large part a gap between intentionality and action (that gap being executive function, which in "that would be fun, but I should do this" scenario makes the this branch choice possible).

Do people actually use provigil off label to improve memory? That seems like a pretty iffy approach, sleeping wold probably work better!