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- W3103365091 abstract "The rise of bots and their influence on social networks is a hot topic that has aroused the interest of many researchers. Despite the efforts to detect social bots, it is still difficult to distinguish them from legitimate users. Here, we propose a simple yet effective semi-supervised method that allows distinguishing between bots and legitimate users with high accuracy. The method learns a joint representation of social connections and interactions between users by leveraging graph-based representation learning. Then, on the proximity graph derived from user embeddings, a sample of bots is used as seeds for a label propagation algorithm. We demonstrate that when the label propagation is done according to pairwise account proximity, our method achieves F 1 = 0.93, whereas other state-of-the-art techniques achieve F 1 ≤ 0.87. By applying our method to a large dataset of retweets, we uncover the presence of different clusters of bots in the network of Twitter interactions. Interestingly, such clusters feature different degrees of integration with legitimate users. By analyzing the interactions produced by the different clusters of bots, our results suggest that a significant group of users was systematically exposed to content produced by bots and to interactions with bots, indicating the presence of a selective exposure phenomenon." @default.
- W3103365091 created "2020-11-23" @default.
- W3103365091 creator A5033526663 @default.
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- W3103365091 date "2020-10-17" @default.
- W3103365091 modified "2023-09-26" @default.
- W3103365091 title "Bots in Social and Interaction Networks" @default.
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- W3103365091 doi "https://doi.org/10.1145/3419369" @default.
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