Evaluation of the difference in gaze of expert and beginner in the phenomenon evaluation of fluid simulation

Abstract

In the manufacturing industry, the transfer of knowledge of expert is an issue because the number of experts is decreasing. In order to support knowledge transfer, various support systems have been developed. However documenting knowledge and determining the level of system users is a concern. This study aims to develop a technique for knowledge extraction and user level judgement using gaze measurement. In order to develop these techniques, the difference of gaze between expert and beginner need to be evaluated. In this study, the gaze of experts and beginners were measured in relation to the vortex exploration skill in the task to explore for vortices which is a typical phenomenon from fluid simulation results. 6 fluid simulation result pictures were presented to experts and beginners, and their gaze was measured. Our result suggested that the expert observe vortex area and area without vortex long time. Beginner did not observe the horizontal elliptical vortices many times, as a result they often missed it. Beginner’s gaze transfer between vortices area many times than expert’s. Expert’s pupil size was larger than beginner’s. These results imply that the experts observe the simulation result image widely, find a place where there is a possibility of a vortex, and concentrate long time to judge whether it is a vortex. On the other hand, the beginners find a place where there is a possibility vortex in the simulation result image and compare other area where there is a possibility vortex to judge whether it is a vortex. By utilizing the gaze measurements, the method of exploring the vortex of the experts was revealed and it was found that user’s level can be judged.

Keywords

• knowledge transfer
• gaze measurement
• aoi
• fixation
• pupil size
• fluid simulation