一般注記The purpose of this study was to clarify from which part of the smile, of different intensities, positive impressions are obtained using an eye tracker.The subjects were 60 young adults (23 males and 37 females, mean age 22.6 ± 2.3 years). The stimulus images used for eye tracking were the average faces of 10 adult males (mean age: 24.5 ± 2.4 years) and 10 adult females (mean age: 25.9 ± 1.3 years) synthesized from their respective face photographs in order to eliminate individuality. The stimulus images were three average faces of males and females: a neutral face with a closed mouth, a smile with a closed mouth, and a grin with exposed teeth. The measurement sites were the eyes, nose, and mouth. Gaze fixation time at each measurement site was measured during the questioning session using pairs of adjectives that were considered important in a previous study for the impression evaluation of stimulus images of both sexes. The median gaze fixation time was then compared between stimulus images. Although there was no substantial change in gaze fixation time on the eye and nose areas in the average face of both sexes, a characteristic change in gaze fixation time on the mouth area was noted when a grin was shown.In a previous study in which factor analysis of impressions from a neutral face, smile, and grin was performed, the factor score was highest for a grin with exposed teeth in stimulus images of both sexes, with improvements noted in positive impressions such as “sociable,” “active,” “friendly,” and “elegant.” This study revealed that positive impressions are gained by looking at the mouth with exposed teeth among dental students.
2021年度
連携機関・データベース国立情報学研究所 : 学術機関リポジトリデータベース（IRDB）（機関リポジトリ）