来自《耶鲁大学开放课程：心理学导论 第17集 第17集》

• 
  
  Okay. Anybody of you that has been getting under five hours a night?
  好的 你们中有谁试过每晚睡眠少于五小时的
• 
  
  Okay. There is big individual differences in how much sleep people need
  好的 在人们的睡眠需求上存在很大的个体差异
• 
  
  and sleep itself is what we spend a lot of our life on
  睡眠本身就是我们花费了很多时间在上面的东西
• 
  
  but it's very hard to study and we didn't used to know much of it
  但很难去研究 我们之前对它的认识也很少
• 
  
  because you can't ask people what's happening during it because they're sleeping
  你不可能去问他人在睡觉的时候发生了什么 因为他们睡着了
• 
  
  so you need sort of clever methods. One such clever method is an EEG.
  因此需要一些聪明的方法 其中一个聪明的方法是脑电图
• 
  
  You bring somebody in the sleep lab, you put electrodes on their scalp
  把被试带到睡眠实验室 把电极连接到他们的头皮上
• 
  
  and you see what these-- what sort of electrical activities you get in the brain.
  然后你会看到大脑中的脑电活动
• 
  
  Right now many of you are showing irregular beta waves
  现在你们很多人都是呈现不规则的β波
• 
  
  suggesting intense comprehension and great intellectual focus.
  表示有高度理解和高度的思维集中
• 
  
  Some of you are awake but non attentive and your brain's giving you these large,
  有些人虽然清醒但是注意力不集中 你们的脑袋正产生大规模
• 
  
  regular alpha waves. Some of you are sound asleep, deep in delta.
  规则的α电波 有些人已经睡着了 沉浸在δ波中