TY  - UNPB
EP  - 12
ID  - eprints2371
UR  - http://arxiv.org/abs/1411.2893
KW  - Misinformation
KW  -  Virality
KW  -  Attention Patterns
Y1  - 2014/11//
AV  - none
TI  - Viral misinformation: the role of homophily and polarization
N2  - The spreading of unsubstantiated rumors on online social networks (OSN) either unintentionally or intentionally (e.g., for political reasons or even trolling) can have serious consequences such as in the recent case of rumors about Ebola causing disruption to health-care workers. Here we show that indicators aimed at quantifying information consumption patterns might provide important insights about the virality of false claims. In particular, we address the driving forces behind the popularity of contents by analyzing a sample of 1.2M Facebook Italian users consuming different (and opposite) types of information (science and conspiracy news). We show that users' engagement across different contents correlates with the number of friends having similar consumption patterns (homophily), indicating the area in the social network where certain types of contents are more likely to spread. Then, we test diffusion patterns on an external sample of 4,709 intentional satirical false claims showing that neither the presence of hubs (structural properties) nor the most active users (influencers) are prevalent in viral phenomena. Instead, we found out that in an environment where misinformation is pervasive, users' aggregation around shared beliefs may make the usual exposure to conspiracy stories (polarization) a determinant for the virality of false information. 
M1  - working_paper
PB  - ArXiv
A1  - Anagnostopoulos, Aris
A1  - Bessi, Alessandro
A1  - Caldarelli, Guido
A1  - Del Vicario, Michela
A1  - Petroni, Fabio
A1  - Scala, Antonio
A1  - Zollo, Fabiana
A1  - Quattrociocchi, Walter
ER  -