Effect of Mental Fatigue on Visual Selective Attention

摘要

To explore the effect of human mental fatigue on their visual selective attention, and carry out ergonomic design in monitoring operation system. Thirty-two men participated the experiment, 140 min digital 2-back task was used to simulate the monitoring work to induce mental fatigue, then simulation of automatic alarm based on 2 × 3 factors cue-target paradigm was used to measure the selective attention ability. The influence of mental fatigue on visual selective attention was explored by analyzing behavioral and event-related potentials data. The results showed that 140 min 2-back cognitive task induces mental fatigue successfully. Under the condition of mental fatigue, the invalid cue and the target stimulus in central cue-target paradigm had the strongest fatigue effect, while the effective cue and the interfere stimulus had the weakest. The subjects' performance of the selective attention task decreased and P300 latency was significantly prolonged and amplitude decreased significantly, mental fatigue has a negative effect on visual selective attention.