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.

或许考高分的秘诀不只是“啃书本”了：大学生的另一项调查发现，那些自称早上头脑更清晰的人，通常也比那些夜晚型的人更容易考高分。这很可能也是因为早起型的人更容易准时上课或不去参加深夜派对吧。研究人员还认为，记忆可能会在睡眠时得到增强，所以早点上床准备第二天早起的话，确实会有助于吸收记忆考试内容吧。