Alessandro Bessi

Publications30
h-index21
Citations3,729
Highly Influential Citations199
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The spreading of misinformation online
TLDR
A massive quantitative analysis of Facebook shows that information related to distinct narratives––conspiracy theories and scientific news––generates homogeneous and polarized communities having similar information consumption patterns, and derives a data-driven percolation model of rumor spreading that demonstrates that homogeneity and polarization are the main determinants for predicting cascades’ size.
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Social Bots Distort the 2016 US Presidential Election Online Discussion
TLDR
The findings suggest that the presence of social media bots can indeed negatively affect democratic political discussion rather than improving it, which in turn can potentially alter public opinion and endanger the integrity of the Presidential election.
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Science vs Conspiracy: Collective Narratives in the Age of Misinformation
TLDR
The results show that polarized communities emerge around distinct types of contents and usual consumers of conspiracy news result to be more focused and self-contained on their specific contents.
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Echo Chambers: Emotional Contagion and Group Polarization on Facebook
TLDR
The findings show that communities’ emotional behavior is affected by the users’ involvement inside the echo chamber, and that, on average, more active users show a faster shift towards the negativity than less active ones.
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Debunking in a world of tribes
TLDR
This work examines the effectiveness of debunking on Facebook through a quantitative analysis of 54 million users over a time span of five years, and confirms the existence of echo chambers where users interact primarily with either conspiracy-like or scientific pages.
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Emotional Dynamics in the Age of Misinformation
TLDR
This work addresses the emotional dynamics of collective debates around distinct kinds of information—i.e., science and conspiracy news—and inside and across their respective polarized communities and finds that for both kinds of content the longer the discussion the more the negativity of the sentiment.
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Personality traits and echo chambers on facebook
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Users Polarization on Facebook and Youtube
TLDR
It is shown that content drives the emergence of echo chambers on both platforms and that the users’ commenting patterns are accurate predictors for the formation of echo-chambers.
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Anatomy of news consumption on Facebook
TLDR
The anatomy of the information space on Facebook is explored by characterizing on a global scale the news consumption patterns of 376 million users over a time span of 6 y, finding that users tend to focus on a limited set of pages, producing a sharp community structure among news outlets.
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Trend of Narratives in the Age of Misinformation
TLDR
This work studies, by means of a thorough quantitative analysis, how different topics are consumed inside the conspiracy echo-chamber in the Italian Facebook, and shows that the most consumed contents semantically refer to four specific categories: environment, diet, health, and geopolitics.
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