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The Effects of the Level of Alertness During the Rest Period on Subsequent Performance

Hirose A., Nagasaka A.

International Journal of Occupational Safety and Ergonomics

2003

Vol. 9, No. 4

479--490

The aim of this study was to examine how to take an effective rest to prevent a decline in alertness at work. The relationship between alertness during the rest period and subsequent task performance were investigated. The electroencephalogram (EEG) during the rest period was classified into 3 types, and these types had a significant effect on performance after the rest period. Type 1 (increasing in theta, alpha 2, and beta 1 power) was the best one for carrying out the task, whereas performance gradually declined in Type 3 (no change in EEG activity). In the case of Type 1, the method that would relieve sleep inertia bad a more positive impact on performance after the rest period.