Affective Polarization and Dynamics of Information Spread in Online Networks
arxiv(2023)
摘要
Members of different political groups not only disagree about issues but also
dislike and distrust each other. While social media can amplify this emotional
divide – called affective polarization by political scientists – there is a
lack of agreement on its strength and prevalence. We measure affective
polarization on social media by quantifying the emotions and toxicity of reply
interactions. We demonstrate that, as predicted by affective polarization,
interactions between users with same ideology (in-group replies) tend to be
positive, while interactions between opposite-ideology users (out-group
replies) are characterized by negativity and toxicity. Second, we show that
affective polarization generalizes beyond the in-group/out-group dichotomy and
can be considered a structural property of social networks. Specifically, we
show that emotions vary with network distance between users, with closer
interactions eliciting positive emotions and more distant interactions leading
to anger, disgust, and toxicity. Finally, we show that similar information
exhibits different dynamics when spreading in emotionally polarized groups.
These findings are consistent across diverse datasets spanning discussions on
topics such as the COVID-19 pandemic and abortion in the US. Our research
provides insights into the complex social dynamics of affective polarization in
the digital age and its implications for political discourse.
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