Mejia-Maidl Martha, Evans Carla A, Viana Grace, Anderson Nina K, Giddon Donald B
Department of Orthodontics, University of Illinois, Chicago, IL 60612-7211, USA.
Angle Orthod. 2005 Nov;75(6):953-8. doi: 10.1043/0003-3219(2005)75[953:PFFPBM]2.0.CO;2.
The objective of this study was to determine differences between Mexican American and Caucasian judges in the acceptability of lip protrusion in computer animations of two male and two female persons of Mexican descent. Thirty Caucasians and 30 Mexican Americans of varying age, sex, education, and level of acculturation responded to facial profile computer animations that moved lips from an extreme protrusive to an extreme retrusive position. Judges were asked to complete two tasks: (1) to press the mouse button when the image was perceived to be most pleasing (MP) and (2) to determine the boundaries of a zone of acceptability (ZA) of lip protrusion by pressing the mouse button when the moving image became acceptable and releasing it when the image of the protrusion became unacceptable. In general, Mexican Americans preferred upper or lower lip positions to be less protrusive than did Caucasians. Larger mean ZAs for both upper and lower lip positions with male computer animation images and lower lip position for female computer animation images were found among Caucasians when compared with low-acculturated Mexican Americans. A significant mean difference in midpoint of acceptability (MA) for lip position between Caucasians and low-acculturated Mexican Americans was observed for both upper and lower lip position with female computer animation images.
本研究的目的是确定墨西哥裔美国人和白人评委对两名墨西哥裔男性和两名墨西哥裔女性的计算机动画中嘴唇突出度的可接受性差异。30名不同年龄、性别、教育程度和文化适应水平的白人和30名墨西哥裔美国人对脸部侧面的计算机动画做出反应，动画中嘴唇从极度突出位置移动到极度后缩位置。评委被要求完成两项任务：（1）当图像被认为最令人愉悦（MP）时按下鼠标按钮；（2）通过在移动图像变得可接受时按下鼠标按钮，并在突出图像变得不可接受时松开按钮，来确定嘴唇突出度的可接受区域（ZA）的边界。总体而言，墨西哥裔美国人比白人更喜欢上唇或下唇位置不那么突出。与文化适应程度低的墨西哥裔美国人相比，白人在男性计算机动画图像的上唇和下唇位置以及女性计算机动画图像的下唇位置上发现了更大的平均可接受区域。在女性计算机动画图像的上唇和下唇位置上，观察到白人和文化适应程度低的墨西哥裔美国人在嘴唇位置的可接受中点（MA）上存在显著的平均差异。
