Abstract
The authors have been working on the estimation of emotions from body movements in personal fabrication tasks. Body movements express emotions，and these expressions vary among individuals. This is one of reasons why emotion estimation with body movements is difficult. Here，the authors assume that there are emotion expression types，and people of each type share emotion expression somewhat. In this study，the authors propose a novel extraction method of emotional body expression types by body movements. We propose a method to classify expression types only by body movements，which is based on the concept of sensitivity analysis. In addition, we perform an experiment to measure body movements and emotions in fabrication task and analyze extract expression types. Finally，we evaluate accuracy of estimation considering emotional expression types to evaluate the method. The accuracy of estimations was on average 67.98%，which was approximately 17% higher than the estimation without considering expression types. The results suggest that the proposed method is useful for emotion estimation.
