航天医学与医学工程

目的根据被试者瞳孔在执行不同难度任务过程中的变化,分析不同难度任务引起的脑力负荷的变化。方法10名被试者执行不同难度等级的视觉搜索任务,通过眼动仪记录被试者的瞳孔面积数据,分析在不同脑力负荷下瞳孔面积的变化,以了解瞳孔大小与脑力负荷之间的相关性。结果被试者之间的瞳孔面积变化既存在2种相同变化规律,又有3种不同的差异,差异表现在瞳孔增大出现在不同的等级任务下。结论在相同的工作环境中,瞳孔面积的变化能够评价脑力负荷的不同:随着工作难度水平的增加,瞳孔缩小;而随着紧张程度的增加,瞳孔扩大;当到达一定疲劳程度之后,瞳孔开始缩小。

Objective To evaluate mental workload by changes of the subjects’ pupil area during their performances of variable difficulty missions. Methods Ten subjects executed missions of variable difficulty vision search tasks, their pupil areas were measured with and noted with an eye movement measuring system. Changes of pupil area under different mental workloads were analyzed to understand the pertinency of pupil and mental workload. Results The changes of pupil area among subjects had two same orderliness and three different diversities. The diversities were the appearance of pupil expanding on the different difficulty grade tasks. Conclusion In the same working environment, the changes of pupil area can evaluate the difference of mental workload:pupil will dwindle with the increase of working difficulty, it will expand with the augment of tensity;pupils will dwindle during certain degree of fatigue.