Data from two studies were used to estimate the reliability of facial EMG when used to index facial mimicry (Study 1) or affective reactions to pictorial stimuli (Study 2). Results for individual muscle sites varied between muscles and depending on data treatment. For difference scores, acceptable internal consistencies were found only for corrugator supercilii, and test-retest reliabilities were low. For contrast measures describing patterns of reactions to stimuli, such as high zygomaticus major combined with low corrugator supercilii, acceptable internal consistencies were found for facial reactions to smiling faces and positive affective reactions to affiliative images (Study 2). Facial reactions to negative emotions (Study 1) and facial reactions to power and somewhat less to achievement imagery (Study 2) showed unsatisfactory internal consistencies. For contrast measures, good temporal stability over 24 months (Study 1) and 15 months (Study 2), respectively, was obtained. In Study 1, the effect of method factors such as mode of presentation was more reliable than the emotion effect. Overall, people's facial reactions to affective stimuli seem to be influenced by a variety of factors other than the emotion-eliciting element per se, which resulted in biased internal consistency estimates. However, the influence of these factors in turn seemed to be stable over time.

Human interactions are replete with emotional exchanges, and hence, the ability to decode others' emotional expressions is of great importance. The present research distinguishes between the emotional signal (the intended emotion) and noise (perception of secondary emotions) in social emotion perception and investigates whether these predict the quality of social interactions. In three studies, participants completed laboratory-based assessments of emotion recognition ability and later reported their perceptions of naturally occurring social interactions. Overall, noise perception in the recognition task was associated with perceiving more negative emotions in others and perceiving interactions more negatively. Conversely, signal perception of facial emotion expressions was associated with higher quality in social interactions. These effects were moderated by relationship closeness in Greece but not in Germany. These findings suggest that emotion recognition as assessed in the laboratory is a valid predictor of social interaction quality. Thus, emotion recognition generalizes from the laboratory to everyday life.

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Mimicry, the imitation of the nonverbal behaviour of others, serves to establish affiliation and to smoothen social interactions. The present research aimed to disentangle rapid facial reactions (RFRs) to affiliative emotions from RFRs to nonaffiliative emotions from a trait perspective. In line with the Mimicry in Social Context Model by Hess and Fischer, we expected that only the former are mimicry responses indicative of underlying social relating competence and predictive of social satisfaction, whereas the latter superficially resemble mimicry responses and are driven by social relating incompetence and have opposite effects on social satisfaction. Further, we assumed that social relating competence would moderate the relationship between stable individuals' tendencies to show (mal) adaptive RFRs and social satisfaction. To test these hypotheses, 108 participants first completed scales measuring social relating competence, then participated in a mimicry laboratory task and finally evaluated their naturally occurring social interactions for 10 days. Affiliative RFRs to sadness were related to proximal indices of social relating competence and predicted positive social interactions, whereas nonaffiliative RFRs to disgust were related to social relating incompetence and predicted negative social interactions. By contrast, neither affiliative RFRs to happiness nor nonaffiliative RFRs to anger were linked to proximal indices of social relating competence, and both RFRs were only (dys)functional for interaction quality in less social relating-competent individuals.

Data from two studies were used to estimate the reliability of facial EMG when used to index facial mimicry (Study 1) or affective reactions to pictorial stimuli (Study 2). Results for individual muscle sites varied between muscles and depending on data treatment. For difference scores, acceptable internal consistencies were found only for corrugator supercilii, and test-retest reliabilities were low. For contrast measures describing patterns of reactions to stimuli, such as high zygomaticus major combined with low corrugator supercilii, acceptable internal consistencies were found for facial reactions to smiling faces and positive affective reactions to affiliative images (Study 2). Facial reactions to negative emotions (Study 1) and facial reactions to power and somewhat less to achievement imagery (Study 2) showed unsatisfactory internal consistencies. For contrast measures, good temporal stability over 24 months (Study 1) and 15 months (Study 2), respectively, was obtained. In Study 1, the effect of method factors such as mode of presentation was more reliable than the emotion effect. Overall, people's facial reactions to affective stimuli seem to be influenced by a variety of factors other than the emotion-eliciting element per se, which resulted in biased internal consistency estimates. However, the influence of these factors in turn seemed to be stable over time.

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Conflicts are an undesirable yet common aspect of daily interactions with wide-ranging negative consequences. The present research aimed to examine the buffering effect of experimentally instructed reappraisal on self-reported, physiological and behavioral stress indices during interpersonal conflicts, taking into account habitual emotion regulation strategies. For this, 145 participants experienced a standardized laboratory conflict with the instruction to either reappraise (n = 48), to suppress (n = 50), or with no instruction (n = 47) while cardiovascular and neuroendocrine measures were taken. Participants were allowed to eat sweet and salty snacks during the conflict situation. Prior to as well as after the conflict, participants reported on their subjective stress level. Reappraisal instructions were only effective for high habitual reappraisers who exhibited lower cardiovascular and cortisol reactivity and demonstrated fewer snack-eating behaviors under reappraisal instructions than under suppression or no instructions. The opposite pattern emerged for low habitual reappraisers. Neither experimentally instructed nor habitual reappraisal by itself reduced the negative effects of conflicts. Our findings complement the literature on the diverging effects of instructed reappraisal in tense social interactions.

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