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Mitchell Centre Seminar Series

Dates:16 October 2019
Times:16:00 - 17:30
What is it:Seminar
Organiser:School of Social Sciences
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  • In group "The Mitchell Centre"
  • In group "(SoSS) Sociology"
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David Schoch, The University of Manchester

Projecting Signed Two-Mode Networks

Research on signed networks is mainly driven by structural balance theory and the concept of clusterability by Davis. Many empirical studies exist that investigate the theory in different settings using a plethora of different measures to assess the ``balancedness'' of a network. Comparably little attention has been paid to adapting other network analytic tasks, such as centrality. One of the more developed tools is the adaption of blockmodeling for signed networks, including signed two-mode networks, put forward by P. Doreian and collaborators. In this talk, I will discuss the possibility of projecting signed two-mode networks onto one focal mode and describe two different projection methods. The projections no longer only include positive and negative ties, but also so called ambivalent ties. This third type of ties poses various technical difficulties, for instance in the definition of the adjacency matrix. I will illustrate how to analyze networks containing all three types of ties using complex matrices. The introduced methods are applied to a large signed two-mode network derived from commenting behavior of users in political subreddits

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