Dong M Q, Ma R S
Department of Aerospace Physiology, The Fourth Military Medical University, Xi'an, China.
Space Med Med Eng (Beijing). 1999 Apr;12(2):106-10.
Objective. To compare the sensitivities of indexes used in the assessment of mental load. Method. Twenty five indexes belonging to primary task performance, additional task performance, subjective rate and psychophysiological measure were recorded during performance of 11 different difficult tasks. Result. It showed that tracking error (ER), reaction time (RT), correct rate (CR), category scale (CS), multistage evaluation scale (MES), multi-dimensional scale (MDS), latency of P3 (LAT), inter beat interval (IBI), inter respiration interval (IRI) and blink rate (BR) were significantly different among the various tasks. CS, MES and MDS were more sensitive to the total load; ER, LAT, IBI and IRI were more sensitive to the load of primary task, while RT and CR to that of additional task and BR to the visual load. Conclusion. It demonstrated that the sensitivities of the various indexes are different and the information are limited. Multi-indexes may be preferred for mental load assessment.
目的。比较用于评估心理负荷的各项指标的敏感性。方法。在执行11项不同难度任务的过程中，记录了属于主要任务表现、额外任务表现、主观评分和心理生理测量的25项指标。结果。结果表明，不同任务之间的跟踪误差（ER）、反应时间（RT）、正确率（CR）、类别量表（CS）、多级评估量表（MES）、多维量表（MDS）、P3潜伏期（LAT）、心动周期（IBI）、呼吸间隔（IRI）和眨眼率（BR）存在显著差异。CS、MES和MDS对总负荷更敏感；ER、LAT、IBI和IRI对主要任务的负荷更敏感，而RT和CR对额外任务的负荷更敏感，BR对视觉负荷更敏感。结论。结果表明，各项指标的敏感性不同且信息有限。心理负荷评估可能更适合采用多指标法。
