Appendix A

Network Terms and Measures

Attribute

A characteristic of a network member, such as age, education, gender, specialty, discipline, or other background or demographic characteristics.

Centrality

The extent to which a network member is central. Centrality can take several forms: degree centrality, often gauged using the relative number of direct ties as a proportion of the total number of network ties; betweenness centrality, centrality with respect to the largest constituencies; and closeness centrality, network members with the shortest average paths to all the other members.

Clique

A subset of three or more densely interconnected people. A strict definition specifies all possible relationships present; a relaxed definition specifies ...

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