Fig. 2.

(A) Video clips were used as stimulus material in all conditions. In the observation condition, participants were presented with videos showing actors demonstrating a happy facial expression, a non-emotional facial movement, or a neutral face without any movement. Participants were asked to observe the actors without making any movement themselves. In the execution condition, scrambled video clips were presented; a colored fixation cross in the middle of the scramble indicated which movement had to be executed by the participants. (B) One block encompassed 4 video clips à 5 s. Blocks were separated by a low level baseline of 5 s duration.