McClelland Laura E, Pilcher June J
Department of Psychology, Clemson University, South Carolina, 29634-1355, USA.
Behav Med. 2007 Spring;33(1):17-26. doi: 10.3200/BMED.33.1.17-28.
Investigators in previous research have indicated that subjective measures of sleepiness may separate into state- and behavior-based dimensions; however, researchers have not examined this under sleep deprivation conditions. The authors' purpose in this study was to examine several measures of subjective sleepiness under sleep deprivation conditions following completion of various tasks. Fourteen students participated in a 28-hour sleep deprivation study and completed vigilance and cognitive tasks 4 times during the night. The authors administered subjective measures of sleepiness after each task. Factor analyses indicated that when individuals were not excessively sleepy, subjective sleepiness measures separated into 2 dimensions: state and behavioral sleepiness. However, when individuals were more fatigued, there was no distinction between the state and behavior dimensions of sleepiness. The current results suggest that using measures that assess state and behavioral sleepiness separately could be useful in clinical and research settings when extreme levels of sleepiness are not expected.
以往研究中的调查人员指出，困倦的主观测量可能分为基于状态和行为的维度；然而，研究人员尚未在睡眠剥夺条件下对此进行研究。作者在本研究中的目的是在完成各种任务后，研究睡眠剥夺条件下几种主观困倦测量方法。14名学生参与了一项28小时的睡眠剥夺研究，并在夜间4次完成警觉性和认知任务。作者在每次任务后进行了困倦的主观测量。因素分析表明，当个体没有过度困倦时，主观困倦测量分为两个维度：状态性困倦和行为性困倦。然而，当个体更疲劳时，困倦的状态和行为维度之间没有区别。目前的结果表明，当预计不会出现极度困倦时，在临床和研究环境中分别使用评估状态性困倦和行为性困倦的测量方法可能会有用。
