Relationship between Physiological Responses and Feelings Change Induced by Mental Workload

Complexity throughout modern society increasingly provides unavoidable stresses, and various studies attempting to establish a quantitative evaluation method for mental stress have been conducted. Though the relationship between mental stress and physiological response has been extensively reported, few reports have tried to clarify the relationship between various physiological responses and the feelings induced by mental tasks. In this study, we investigated autonomic nervous system activities to find a physiological index based on which we were able to evaluate the intensity of mental stress. As a result, we found that RRI was sensitive index to the feelings and the amplitude of the PTG might relate to the degree of fatigue.