Sleeping is good for studying
2007-12-14 20:29
New York - Students who rely on working at night to improve their grades might want to sleep on that strategy: a new survey in the US says those who never study all night have slightly higher grades than those who do.
A survey of 120 students at St Lawrence University, a small liberal arts college in northern New York, found that students who have never pulled an all-nighter on average have higher grades than those who have. The survey found those who did not study through the night had a grade point average of 3.2 compared to 2.95 for those who have.
The study, by assistant professor of psychology Pamela Thacher, is to be included in the January issue of Behavioural Sleep Medicine.
"It's not a big difference, but it's pretty striking," Thacher said. "I am primarily a sleep researcher and I know nobody thinks clearly at four in the morning. You think you do, but you can't."
Findings make sense
A second study by Thacher, a clinical psychologist, had "extremely similar" results showing lower grades among the sleep skippers.
Many college students, of course, have inadequate or irregular sleep, for reasons ranging from excessive caffeine to poor time management.
Prav Chatani, a St Lawrence sophomore who wasn't involved in either study, said the findings made sense. The neuroscience major has been pulling fewer all-nighters, but recently stayed up all night to prepare for an organic chemistry test and a neuroscience presentation, he said.
He had difficulty remembering some of the material he studied around 4 or 5 in the morning.
"A lot of students were under the impression all-nighters were a very useful tool for accomplishing work, that caffeine intake was very useful in meeting deadlines and stuff like that," said Chatani, who had a 3.4 grade point average, or GPA, last semester and doesn't expect to do too badly this semester, either.
Dr Howard Weiss, a physician at St Peter's Sleep Centre in Albany, said the study results make sense.
"Certainly that data is out there showing that short sleep duration absolutely interferes with concentration, interferes with performance on objective testing," he said.
Some night owls do get good grades, of course, which may be explained by circadian rhythms, Weiss said. Circadian rhythms can be tracked through body temperature and hormonal transmissions.
Some people have different 24-hour body clocks than others, and may do better depending on class and testing times, Weiss said.
- AP