Schmidt Karen L, Ambadar Zara, Cohn Jeffrey F, Reed L Ian
Karen L. Schmidt, Zara Ambadar, Jeffrey F. Cohn, and L. Ian Reed are affiliated with the University of Pittsburgh, Pittsburgh, PA 15260, USA. Jeffrey F. Cohn is also affiliated with the Carnegie Mellon University, Pittsburgh, PA 15260, USA.
J Nonverbal Behav. 2006;30(1):37-52. doi: 10.1007/s10919-005-0003-x.
Previous research suggests differences in lip movement between deliberate and spontaneous facial expressions. We investigated within participant differences between deliberately posed and spontaneously occurring smiles during a directed facial action task. Using automated facial image analysis, we quantified lip corner movement during periods of visible Zygomaticus major activity. Onset and offset speed, amplitude of movement, and offset duration were greater in deliberate smiles. In contrast to previous results, however, lip corner movement asymmetry was not greater in deliberate smiles. Observed characteristics of deliberate and spontaneous smiling may be related to differences in the typical context and purpose of the facial signal.
先前的研究表明,刻意的面部表情和自发的面部表情在嘴唇动作上存在差异。我们在一项定向面部动作任务中,研究了参与者在刻意摆出的笑容和自然出现的笑容之间的差异。通过自动面部图像分析,我们量化了在可见的颧大肌活动期间嘴角的运动。刻意微笑时,起始和结束速度、运动幅度和结束持续时间更大。然而,与先前的结果相反,刻意微笑时嘴角运动的不对称性并不更大。观察到的刻意微笑和自然微笑的特征可能与面部信号的典型背景和目的差异有关。