Facial movements of android robots should be designed carefully to achieve desired impressions. Therefore, it is essential to understand in detail which impressions each main movement component provides to humans. In this study, we adopted the design of experiments method to efficiently investigate the effect of each movement composing smiling expressions on the personality trait impressions. Ninety-three participants answered the impressions of different combinations of facial movements, and statistical tests were conducted to evaluate the main effects of each movement. Significant movement effects on three types of personality impressions are introduced, and the potential design policy of smiling facial expressions conveying desired personality impressions is discussed in this report.
