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上课打瞌睡更有助于记忆,这是真的么

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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 US lead author 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 retain. Along with colleagues, she studied 207 students who habitually slept for at least six hours per night. Participants were randomly assigned to study declarative, semantically related or unrelated word pairs at 9am or 9pm, 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 episodic memory (memory for events) and semantic memory (memory for facts about the world). People routinely 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 superior following a night of sleep compared to a day of wakefulness. At the 24-hour retest, with all subjects having received both a full night of sleep and a full day of wakefulness, subjects` memories were superior 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 novel 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 rehearse any information you need to remember just prior to going to bed. In some sense, you may be “telling” the sleeping brain what to consolidate.’

Results of the study were published on March 22 in PLOS One.
 

事实证明,在课堂上打盹也许不是一个坏主意,因为一项新的研究表明,学习新材料后很快入睡是记住它的最好方法。
据美国圣母大学的一位心理学家Jessica Payne说,在学习新事物后,打盹儿就像“告诉”睡觉的大脑保留什么东西一样。”说。她和同事一起研究了207名每晚习惯睡眠至少六小时的学生。参与者被随机分配到研究陈述,语义相关或非相关词对九点或九点,回来测试30分钟、12小时或24小时后。
陈述性记忆指的是有意识地记忆事实和事件的能力,可分为情景记忆(事件记忆)和语义记忆(关于世界事实的记忆)。人们通常每天都使用这两种记忆——回想我们今天停在哪里,或者学习一个同事喜欢如何处理。在12个小时的复测中,一个晚上的睡眠比一天的清醒要好。在24小时的复测中,所有受试者都接受了一整夜的睡眠和一整天的清醒,当学习结束后睡眠很快,而不是一整天的清醒之后,实验对象的记忆力要好得多。
我们的研究证实,学习新事物后直接睡觉对记忆力有好处。什么`这项研究的创新之处是,我们试图照亮睡眠`的两种陈述性记忆通过对语义无关词对的影响,”派恩说,“因为我们发现后不久,学习两种记忆都有帮助睡眠,这意味着它将是一件好事排练任何你只需要记住睡觉之前。从某种意义上说,你可能在告诉“沉睡的大脑如何巩固”。

 

这项研究结果发表在3月22日的《公共科学图书馆公共科学》杂志上。
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