Multilayer analysis of online social interactions

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Abstract: the development of online platforms and our capacity to collect data of individuals from these has drastically changed the way scientist explore human society. Social systems can be understood as a superposition of various social networks, where nodes and edges represent individuals and their social relations, respectively. While these networks have been mainly studied as aggregates, only recently new theoretical frameworks have allowed to understand their multidimensional nature. In this work, we analyze a multirrelational social system from a massive multiplayer online game, consisting on three networks of different types of one-to-one interactions (friendship, communication and trade). Firstly, we study their structure separately using the usual single-layer approach. We find that two of them have a very similar structure while the third one is denser and presents a slightly different connectivity pattern. For the second part, we implement measurements that consider the multidimensional nature of the system and give insights on how players behave differently depending on the interaction under consideration. The results obtained with these measures indicate that players behave similarly in all the different layers, but that they do so with different people.

Supervisor: Sandro Meloni

Jury: Pere Colet, Manuel A. Matias, and Sandro Meloni

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Sandro Meloni

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