Harrison Y, Bright V, Horne J A
Sleep Research Laboratory, Loughborough University, Leicestershire, UK.
Physiol Behav. 1996 Aug;60(2):681-4. doi: 10.1016/s0031-9384(96)80048-5.
The Multiple Sleep Latency Test (MSLT) is widely believed to offer an objective, physiological measure of sleepiness. The speed with which a person falls asleep throughout the day is understood to be related systematically to sleep need and circadian phase. This study examined whether normal subjects (n = 14 young female adults) could achieve faster MSLT sleep onsets if they were given the incentive to do so. During week 1 baseline MSLTs were determined over 1 day for all subjects. In week 2 they were randomly assigned to two groups. Control subjects underwent a second MSLT testing day identical to that of week 1, whereas Incentive subjects had an additional financial incentive to sleep. There was a significant reduction in sleep onset latency (indicating increased sleepiness) during the 1500 h trial following the incentive, when subjects also reported a significantly greater increase in sleepiness over the trial. These findings suggest that when coupled with a mid-afternoon increase in sleepiness, increased motivation to sleep can reduce sleep onset latency.
多导睡眠潜伏期试验（MSLT）被广泛认为能提供一种客观的、关于嗜睡的生理测量方法。人们一整天入睡的速度被认为与睡眠需求和昼夜节律阶段有系统的关联。本研究考察了正常受试者（n = 14名年轻成年女性）如果受到激励，是否能更快进入MSLT睡眠状态。在第1周，对所有受试者进行为期1天的基线MSLT测定。在第2周，她们被随机分为两组。对照组受试者接受与第1周相同的第二个MSLT测试日，而激励组受试者则有额外的经济激励促使其入睡。在激励后的1500时试验中，睡眠开始潜伏期显著缩短（表明嗜睡增加），此时受试者还报告在试验过程中嗜睡程度显著增加。这些发现表明，当与下午中段嗜睡增加相结合时，增加的睡眠动机可以缩短睡眠开始潜伏期。
