Betweenness centrality measures the extent to which each node falls on the shortest path between other nodes (Freeman 1977). Nodes with high betweenness centrality are likely to be influential, since they are conduits through which information can be shared with otherwise unconnected nodes. Chat betweenness centrality: Each person’s betweenness centrality. Each document pools a single person’s messages to one channel in a 30-minute time period. In such cases, the two edges are collapsed into…

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