| Abstrakt: |
Fatigue while doing electronic screen tasks for a relatively long period is often measured by reaction time. However, it is unknown whether this method is sensitive enough to detect increased fatigue conditions on e-display tasks performed over a short period, especially on high cognitive load tasks. This study aims to examine changes in reaction time associated with short period high cognitive load task. Ten healthy participants performed a two-stage math test with a short period (5-10 minutes per stage). Fatigue, sleepiness, and reaction times were measured at the beginning and immediately after the end of each stage. The Samn-Perelli scale was used to assess mental fatigue. The 5-minute Psychomotoric Vigilance Task (PVT) was administered to measure the reaction time. Next, the relationships among cognitive load, fatigue, and reaction time were assessed using Paired t-test, Pearson correlation, and four utility criteria (precision, sensitivity, accuracy, and specificity). The results show that fatigue scores and reaction times significantly increased during the experiment. It is also found that these two variables have significant positive correlation (p-value=0.024<0.05). Reaction time has a very good sensitivity in detecting increased fatigue. However, the reaction time tend to increase more frequent than the subjective scale. Moreover, there is no significant evidence that the condition decreased the performance. In conclusion, the findings suggest that the reaction time can be used to indicate the development of mental fatigue during short-time e-display work with a high cognitive load. [ABSTRACT FROM AUTHOR] |
