The effects of sleepiness on the detection and the attention for the minute errors.

这项研究的目的是检验困倦对参与者对自己计时任务表现的主观评价的影响。参与者在白天和夜间分别进行了2次认知任务。在夜间条件下的表现低于白天条件下的表现，并且参与者可以意识到这种恶化。在这两种情况下，参与者的表现都比第一组更差，第二组的困倦程度也更严重。然而，参与者并没有意识到自己表现的恶化。

The aim of this study was to examine the effects of sleepiness on the participants' subjective evaluation for their own performance of the timing task. The participants performed 2 sessions of the cognitive task in both daytime and night time conditions. The performance in nighttime condition was lower than that in daytime condition and the participants can recognize this deterioration. In both conditions, the participants performed worse and reported severer sleepiness in the second session compared to that in the first session. However, participants could not realize the deterioration of their own performance.