Flow of online misinformation during the peak of the COVID-19 pandemic in Italy

被引:33
|
作者
Caldarelli, Guido [1 ,2 ,3 ]
De Nicola, Rocco [3 ,5 ]
Petrocchi, Marinella [3 ,4 ]
Pratelli, Manuel [3 ]
Saracco, Fabio [3 ]
机构
[1] Ca Foscari Univ Venice, Dept Mol Sci & Nanosyst, Via Torino 155, I-30170 Venice, Italy
[2] Ca Bottacin, European Ctr Living Technol ECLT, 3911 Dorsoduro Calle Crosera, I-30123 Venice, Italy
[3] IMT Sch Adv Studies Lucca, Piazza San Francesco 19, I-55100 Lucca, Italy
[4] CNR, Inst Informat & Telemat, Via Moruzzi 1, I-56124 Pisa, Italy
[5] CINI Natl Lab Cybersecur, Via Ariosto 25, I-00185 Rome, Italy
关键词
COVID-19; Infodemic; Misinformation; Twitter;
D O I
10.1140/epjds/s13688-021-00289-4
中图分类号
O1 [数学];
学科分类号
0701 ; 070101 ;
摘要
The COVID-19 pandemic has impacted on every human activity and, because of the urgency of finding the proper responses to such an unprecedented emergency, it generated a diffused societal debate. The online version of this discussion was not exempted by the presence of misinformation campaigns, but, differently from what already witnessed in other debates, the COVID-19 -intentional or not- flow of false information put at severe risk the public health, possibly reducing the efficacy of government countermeasures. In this manuscript, we study the effective impact of misinformation in the Italian societal debate on Twitter during the pandemic, focusing on the various discursive communities. In order to extract such communities, we start by focusing on verified users, i.e., accounts whose identity is officially certified by Twitter. We start by considering each couple of verified users and count how many unverified ones interacted with both of them via tweets or retweets: if this number is statically significant, i.e. so great that it cannot be explained only by their activity on the online social network, we can consider the two verified accounts as similar and put a link connecting them in a monopartite network of verified users. The discursive communities can then be found by running a community detection algorithm on this network. We observe that, despite being a mostly scientific subject, the COVID-19 discussion shows a clear division in what results to be different political groups. We filter the network of retweets from random noise and check the presence of messages displaying URLs. By using the well known browser extension NewsGuard, we assess the trustworthiness of the most recurrent news sites, among those tweeted by the political groups. The impact of low reputable posts reaches the 22.1% in the right and center-right wing community and its contribution is even stronger in absolute numbers, due to the activity of this group: 96% of all non reputable URLs shared by political groups come from this community.
引用
收藏
页数:23
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