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All the actors initially showed (a) forward gaze and closed mouth. After one second, the actor shifted her gaze (b) toward the observer or (c) away from him/her. After another one second (i.e., 2 seconds from the onset of the stimulus), the face smiled (d and e). After that, the face remained still for another three seconds. The orientation of the face was right in half of the stimuli and the left in the other half.
