And perhaps the secret to a 4.0 isn’t only hitting the books: Another study of university undergraduates found those who said they function better in the morning received higher grades than those who preferred the evening That’s possibly because morning risers are more likely to get to class on time or to forgo late-night partying. Researchers also suggest memory may improve during sleep, so getting to bed earlier in preparation for a morning alarm could help those exam notes soak in.

或許考高分的秘訣不只是“啃書本”了：大學生的另一項調查發現，那些自稱早上頭腦更清晰的人，通常也比那些夜晚型的人更容易考高分。這很可能也是因為早起型的人更容易準時上課或不去參加深夜派對吧。研究人員還認為，記憶可能會在睡眠時得到增強，所以早點上床準備第二天早起的話，確實會有助于吸收記憶考試內容吧。