Hauri P, Olmstead E
Sleep. 1983;6(1):10-5. doi: 10.1093/sleep/6.1.10.
Subjective estimates of sleep latency were compared with three EEG-assessed measures of sleep onset: (a) the traditional one, i.e., the first epoch that is scored as stage 2 sleep; (b) the beginning of the first 15 min of uninterrupted stage 2 sleep; and (c) the beginning of the first 30 min of uninterrupted stage 2 sleep. A total of 56 insomniacs and 10 good sleepers were studied for 3 nights each in the laboratory. The traditional measure of sleep latency agreed best with the subjective estimates of good sleepers. Most insomniacs, however, were best able to estimate their sleep latency when the 15-min criterion was used. We suggest that for most insomniacs the subjective experience of being asleep occurs later in the EEG-defined transition from waking to sleeping than it does for good sleepers.
(a) 传统指标，即第一个被判定为2期睡眠的时段；(b) 首个连续15分钟2期睡眠的开始；以及(c) 首个连续30分钟2期睡眠的开始。总共56名失眠者和10名睡眠良好者在实验室中每人被研究了3个晚上。睡眠潜伏期的传统指标与睡眠良好者的主观估计最为吻合。然而，大多数失眠者在使用15分钟标准时，最能准确估计自己的睡眠潜伏期。我们认为，对于大多数失眠者来说，从脑电图定义的清醒状态过渡到睡眠状态时，其主观上入睡的体验比睡眠良好者要晚。
