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SSS 2010-07-05

时间:2010-08-05 06:15来源:互联网 提供网友:konicaqq   字体: [ ]
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Teachers get exasperated1 at students—they don’t pay attention, they’re sleepy, they have bad attitudes. But improvement could be a matter of timing—just start school later. That’s according to a study in the Archives of Pediatrics and Adolescent Medicine.

Beginning at adolescence2, kids have what’s called a delayed sleep phase, where they start sleep later and sleep later in the morning. And they need plenty—about nine-and-a-quarter hours a night.

The researchers evaluated 201 Rhode Island high school students whose school pushed back its start time from 8 to 8:30. The kids completed a sleep habits survey before and after the time change.

After the delayed start, the percentage of students who said they got at least eight hours of sleep a night jumped from about 16 to 55 percent. Class attendance improved, and there were fewer visits to the health center for fatigue-related complaints. Plus, the number of students who said they felt unhappy, depressed3, annoyed or irritated dropped significantly.

Before the study, teachers, coaches and administrators4 all resisted the later start. After, nearly all voted to keep it in place. A half-hour change for happier, better students? Seems like a good time for all.

Thanks for the minute for Scientific American’s 60-Second Science. I’m Cynthia Graber


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1 exasperated ltAz6H     
adj.恼怒的
参考例句:
  • We were exasperated at his ill behaviour. 我们对他的恶劣行为感到非常恼怒。
  • Constant interruption of his work exasperated him. 对他工作不断的干扰使他恼怒。
2 adolescence CyXzY     
n.青春期,青少年
参考例句:
  • Adolescence is the process of going from childhood to maturity.青春期是从少年到成年的过渡期。
  • The film is about the trials and tribulations of adolescence.这部电影讲述了青春期的麻烦和苦恼。
3 depressed xu8zp9     
adj.沮丧的,抑郁的,不景气的,萧条的
参考例句:
  • When he was depressed,he felt utterly divorced from reality.他心情沮丧时就感到完全脱离了现实。
  • His mother was depressed by the sad news.这个坏消息使他的母亲意志消沉。
4 administrators d04952b3df94d47c04fc2dc28396a62d     
n.管理者( administrator的名词复数 );有管理(或行政)才能的人;(由遗嘱检验法庭指定的)遗产管理人;奉派暂管主教教区的牧师
参考例句:
  • He had administrators under him but took the crucial decisions himself. 他手下有管理人员,但重要的决策仍由他自己来做。 来自辞典例句
  • Administrators have their own methods of social intercourse. 办行政的人有他们的社交方式。 来自汉英文学 - 围城
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