On online social media users tend to aggregate in echo chambers, where they shape and reinforce their worldview by discussing and interacting with like-minded people. Such a scenario fosters misinformation spreading, which may influence public opinion. To determine the main factors behind narratives’ emergence, characterizing polarization dynamics and users’ emotional response to social contents is, thus, crucial. In this paper, we address such a challenge by looking at two different and contrasting narratives, science and conspiracy. We introduce a new metric, the bipolarity, and show how it can help in finding non-trivial proxies of the debate’s polarization. Our approach may provide interesting insights for a better understanding of both emotional and polarization dynamics on online social media.
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