Exposure to social-evaluative video clips: Neural, facial-muscular, and experiential responses and the role of social anxiety.

Engaging in social interaction often implies being evaluated. Receiving positive evaluations from others may elicit affiliative emotions whereas negative evaluations are likely to trigger withdrawal and defensive social behavior. Evolution has equipped humans with efficient systems to detect, appraise, and regulate responses to such evaluative communications and to express complementary responses. The current study investigates neural, facial-muscular, and experiential responses to short videos delivering neutral, positive, and negative audiovisual messages as well as their relation to individual differences in social anxiety. Fifty-eight participants (32 female) watched 90 videos with male and female actors displaying positive, negative, and neutral statements. Experientially, ratings of valence and arousal showed the expected category differences. Neurally, larger centro-parietal late positive event related potentials were found for emotional (positive and negative) videos compared to neutral videos. Facial electromyography revealed reduced corrugator muscle and increased zygomaticus major muscle activity for positive videos compared to neutral and negative videos. Cognitive components of social anxiety were related to a more unpleasant experience of negative videos and a less pleasant experience of positive videos. Thus, a set of neural, facial-muscular, and experiential responses contribute to social interaction in the context of relatively naturalistic social-evaluative stimuli.
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