Abstract
Eight young subjects were selected to perform three kinds of simulated and monotonous tasks, (inspection, sorting and pursuit tracking), for fifty minutes in each run.
Questionnaire investigation of their subjective consciousness after work showed high complaints rate of negative feeling, alienation from work and unfitness of their aptitude for this kind of work.
The changes of electroenceogram, heart rate increase, variation of heart beat interval, and work error revealed that the slack of nervous tension and the increase of error likely appeared around 10min, 25min and 40min after the beginning of each run, similarly in each task. Combining the reduction of CFF and the prolongation of response time with the above-mentioned results of physiological measurements, the mental workload for the three kinds of tasks seemed to be heaviest in pursuit tracking and lightest in sorting.
