Bulletin of the Society of Naval Architects of Korea (대한조선학회지)
- Volume 11 Issue 1
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- Pages.27-34
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- 1974
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- 1225-1178(pISSN)
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- 2765-2858(eISSN)
The Human Performance Degradation in Vigilance due to Prolonged and Monotonous Tasks
경계(警戒) 임무(任務) 담당자(擔當者)의 시간지연(時間遲延)에 따르는 인간(人間) 성능(性能)의 변화(變化)에 대(對)한 연구(硏究) 및 개선방안(改善方案)
Abstract
This study is aimed at a validation of the vigilance simulation model which was proposed earlier (2). The model estimates a perceived danger value, an alertness level and the probability of detection at a given elapsed time of vigilance. Twenty-nine male and seven female subjects were given a simple task. They were asked to detect a number(four numbers out of six digits in the telephone directory which have the probability of occurrence in the range of 0.0010-0.0018) in six different experimental conditions, for periods of two to three hours. Analysis of the experiments showed that although the mean detection rate varied slightly in two hours, the within-subject variance and the number of cyclic performance fluctuations increased significantly. A primal factor that affects the performance seems to be the frequency of target occurrence. By curve fitting, the relation between the probability of detection and the percentages of danger event occurrence was derived;
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