Social identity shapes antecedents and functional outcomes of moral emotion expression in online networks
As social interactions increasingly occur through social media platforms, intergroup affective phenomena such as “outrage firestorms” and “cancel culture” have emerged with notable consequences for society. In this research, we examine how social identity shapes the antecedents and functional outcomes of moral emotion expression online. Across four pre-registered experiments (N = 1,712), we find robust evidence that the inclusion of moral-emotional expressions in political messages has a causal influence on intentions to share the messages on social media. We find that individual differences in the strength of partisan identification is a consistent predictor of sharing messages with moral-emotional expressions, but little evidence that brief manipulations of identity salience increased sharing. Negative moral emotion expression in social media messages also causes the message author to be perceived as more strongly identified among their partisan ingroup, but less open-minded and less worthy of conversation to outgroup members. These experiments highlight the role of social identity in affective phenomena in the digital age, and showcase how moral emotion expressions in online networks can serve ingroup reputation functions while at the same time hinder discourse between political groups.