It turns out that nodding off in class may not be such a bad idea after all, as a new study has shown that going to sleep shortly after learning new material is the best way to remember it.
According to the leader of the study, Jessica Payne, a psychologist at the University of Notre Dame in Indiana, nodding off after learning something new is like “telling” the sleeping brain what to keep.
Along with her colleagues, she studied 207 students who habitually slept for at least six hours per night. Participants were assigned without any regular pattern to study declarative (陈述性的), semantically (语义上) related or unrelated word pairs at 9 a.m. or 9 p.m., and returned for testing 30 minutes, 12 hours or 24 hours later.
Declarative memory refers to the ability to consciously remember facts and events, and can be broken down into memory for events and memory for facts about the world. People use both types of memory every day --- recalling where we parked today or learning how a colleague prefers to be addressed.
At the 12-hour retest, memory overall was better following a night of sleep compared to a day of wakefulness.At the 24-hour retest, with all participants having received both a full night of sleep and a full day of wakefulness, participants’ memories were better when sleep occurred shortly after learning, rather than following a full day of wakefulness.
“Our study confirms that sleeping directly after learning something new is beneficial for memory. What's new about this study is that we tried to shine light on sleep's influence on both types of declarative memory by studying semantically unrelated and related word pairs,” Payne said.
“Since we found that sleeping soon after learning benefited both types of memory, this means that it would be a good thing to go over any information you need to remember just before going to bed. In some sense, you may be “telling” the sleeping brain what to consolidate (巩固).”
68. What can we learn about the study from the text?
A. It was lead by an Indian psychologist in the USA.
B. It was done by Jessica Payne and her colleagues.
C. More than three hundred students took part in it.
D. Participants were divided into groups according to a special pattern.
69. According to the text, declarative memory ______.
A. can be divided into two types
B. is rarely used in our daily life
C. is unconscious but very useful
D. may influence our sleep quality
70. What does the study want to show us?
A. Why many students can’t stop themselves nodding off in class.
B. How to remember information correctly.
C. Sleeping directly after learning is good for our memory.
D. We can still remember some information when we are sleeping.
BAC