Alejandro Lleras, Associate Professor of Psychology at University of Illinois at Urbana-Champaign, in his acclaimed study, found that brief diversion from your task can dramatically improve your ability to focus on a task for prolonged periods.
Your experience, too, will tell you that when you study without break for long duration, say 90 minutes, you tend to lose focus, your mind starts wavering.
So, if you’ve been slogging hard for over an hour on your assignment or for exam, you may be working well below your potential. Wasting time, in other words.
Moreover, you also need to be intentional about