부산대학교 도서관

To reveal proficiency of trainees in executing of VR training system simulated for real works, relative fluctuation of hemoglobin concentration in prefrontal cortex of nine healthy subjects as well as time required for dose measurement, were investigated in five experiments by using a video camera and a NIRS system. For the purpose of describing prefrontal cortex activation represented by oxy-hemoglobin concentration, the authors originally proposed the event-related index (called ER index) derived from activation of oxy-hemoglobin concentration during dose measurements. As the result of statistical analysis, it was confirmed that average time required for dose measurement and the ER index simultaneously decreased in the second experiment. According to this result and the previous studies for prefrontal cortex functions, the subjects came to the early proficient stage for dose measurement works demonstrated in the VR training system. Therefore, the ER index proposed in this study was consequently considered to be useful for proficiency evaluation of trainees in executing VR training system.