Psychophysiological Research on Mental Workload

配备了用于工作量研究的设施和计算机程序，并完成了两项关于工作量的实验。在此基础上，提出了多参数集成的概念，将生理信号测量设备、视频监控系统和任务呈现计算机在功能上进行了布局和连接，实现了负荷实验中高效的性能和可靠的信号记录。编制了难度水平随被试反应(正确与否)自动变化的心算任务程序和诱发模式2类型反应的特定镜像追踪任务程序。此外，还编制了一个名为SIMPLE(主观指数和心理任务程序)的程序集，用于根据预定的情景执行任务程序，并与情绪和主观工作负荷评估程序相结合。建立了一个实验系统(软件)，它可以统一基线记录(REST)、任务呈现、情绪评估和工作量评估，并几乎实时地计算任务绩效和主观反应。编写了每项生理指标的信号分析程序。特别是编制了心率变异性频谱分析程序，编制了心率变异性自回归模型评价系统及其手册，并进行了间接舒适性评价实验，采用工作负荷研究方法对气味等舒适环境因素进行了考察。结果表明，在工作量研究中不断增长的心理任务和心理生理反应方面的知识似乎对舒适度研究有用。另一方面，任务特异性生理反应的结果与早期研究的结果相似。

Facilities and computer programs for workload research were equipped and two experiments on the workload were completed. Furthermore, a concept about integration of multiple parameters was discussed.Devices for physiological signal measurement, video monitor system and a computer for task presentation were functionally arranged and linked for efficient performance and reliable signal recording in workload experiments. A mental arithmetic task program in which difficulty level varies automatically according to subjects' response (correct or not correct) and a specific mirror tracing task program that induces pattern 2 type response were written. Also, a program set named SIMPLE (Subjective Indexes and Mental task Program for Laboratory Experiments) was composed to execute task programs according to a predetermined scenario and to combine with programs for mood and subjective workload evaluation. An experimental system (software) which makes it possible to unify baseline recording (rest), task presentation, mood evaluation and workload assessment, and to calculate task performances and subjective responses in almost real time was established. Signal analysis programs for each physiological measure were written. Especially, programs for spectral analysis of heart rate variability were composed as the HEART (Heart rate variability Evaluation by Auto Regressive model Technique) SYSTEM and its manual was made.An experiment to evaluate comfort indirectly was performed in which workload research technique was used to investigate comfortable environmental factors such as aromas. The results suggest that knowledge on mental task and psychophysiological responses growing in workload research seems useful for research on comfort. On the other hand, results on task specific physiological responses were similar to findings in earlier studies.