Sleep Research Centre, Loughborough University, Loughborough, Leicestershire, LE11 3TU, UK.
Biol Psychol. 2010 Mar;83(3):266-8. doi: 10.1016/j.biopsycho.2009.12.011. Epub 2010 Jan 11.
The ability to monitor one's sleepiness has obvious implications for safety critical procedures. Laboratory findings indicate that we may be poor at doing this compared with objective measurements (e.g. reaction times (RT)). However, the respective testing situations usually differ, to favour objective measures. These typically entail longer test durations with less distractions; both factors facilitate sleepiness. Using the Karolinska Sleepiness Scale (KSS) we compared subjective responses with RTs, in 2 min epochs, over 10 min periods in identical quiet settings, early afternoon, in 21 healthy volunteers with 5h prior night's sleep restriction. Whereas the initial KSS score was unrelated to 10 min RT, the KSS subsequently showed a similar, significant increase, comparable with RT. Changes in both scores were very significantly correlated. KSS scores indicated that 5 min was an effective 'settling down' period. Participants were good at estimating their sleepiness if presented with a procedure equivalent to that of the objective measure.
监测自身困倦度的能力对安全关键程序具有明显的意义。实验室研究结果表明，与客观测量相比（例如反应时间 (RT)），我们可能在这方面做得较差。然而，各自的测试情况通常不同，这有利于客观测量。这些情况通常需要更长的测试持续时间和更少的干扰；这两个因素都有利于困倦的产生。在相同安静的环境下，我们使用 Karolinska 困倦量表 (KSS) 在 10 分钟的时间段内，每 2 分钟记录一次主观反应和 RT，共招募了 21 名有 5 小时前夜睡眠限制的健康志愿者。尽管初始 KSS 评分与 10 分钟 RT 无关，但随后 KSS 显示出与 RT 相似且显著的增加。这两个分数的变化都非常显著相关。KSS 评分表明 5 分钟是一个有效的“安定”时间。如果向参与者呈现与客观测量等效的程序，他们就能很好地估计自己的困倦度。
