D. Tilly Smith and her family had not left the hotel room before the tsunami struck.
D
Burning the midnight oil before an exam or interview has an opposite effect according to a research which found that sleep is necessary for memories to be “downloaded” into the brain.
“A good night’s sleep within 30 hours of trying to remember a new task is a necessary condition of having good recall in the weeks ahead,” scientists have found.
“We think that getting that first night’s sleep starts the process of memory consolidation(加强),” said Robert Stickgold, a sleep researcher at Harvard Meidical School who conducted the latest study.
“It seems that memories are normally washed out of the brain unless some process nails them down. I feel uncertain that sleep is one of those things that do the nailing down,” Professor Stickgold said.
Professor Stickgold’s team trained the 24 people to tell direction of three diagonal bars(斜线)shown for a sixtieth of a second on a computer screen full of horizontal stripes(水平线).
Half the subjects(受试者) were kept awake that night, while the others slept. Both groups were allowed to sleep for the second and third nights so make up for any differences in tiredness between the volunteers.
Those who slept the first night were much better at remembering the task while the second ground showed no improvement in spite of enjoying two nights of catch-up sleep.
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