Asymmetry in Facial Expressions as a Function of Social Skills

作者：Komori Masashi^*; Kamide Hiroko; Kawamura Satoru; Nagaoka Chika

来源：IEICE Transactions on Information and Systems, 2013, E96D(3): 507-513.

DOI：10.1587/transinf.E96.D.507

• facial expression
• facial asymmetry
• social skills
• landmark-based 3D shape analysis

This study investigated the relationship between social skills and facial asymmetry in facial expressions. Three-dimensional facial landmark data of facial expressions (neutral, happy, and angry) were obtained from Japanese participants (n = 62). Following a facial expression task, each participant completed KiSS-18 (Kikuchi's Scale of Social Skills; Kikuchi, 2007). Using a generalized Procrustes analysis, faces and their mirror-reversed versions were represented as points on a hyperplane. The asymmetry of each individual face was defined as Euclidian distance between the face and its mirror reversed face on this plane. Subtraction of the asymmetry level of a neutral face of each individual from the asymmetry level of a target emotion face was defined as the index of "expression asymmetry" given by a particular emotion. Correlation-coefficients of KiSS-18 scores and expression asymmetry scores were computed for both happy and angry expressions. Significant negative correlations between KiSS-18 scores and expression asymmetries were found for both expressions. Results indicate that the symmetry in facial expressions increases with higher level of social skills.

• 出版日期2013-3