Figure 2 .

Main effects of Emotion conditions on four aspects of facial motion in Experiment 1. Each trajectory line is the functional, time-aligned mean across all actors, vocal channels, statements, and repetitions (192 trials per trajectory line). Zero represents the neutral “at rest” position of the facial feature. Dashed vertical lines between Vocal Onset and Offset indicate syllable boundaries. Black horizontal lines below trajectories indicate regions of significance at p < 0.05. Error bars are indicated by shaded regions around trajectory lines, where error bars denote the standard error of the means. (a) Mean vertical displacement of left lip corner. (b) Mean vertical displacement of left brow. (c) Mean horizontal displacement of left brow. (d) Mean Euclidean displacement of the jaw.