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Social Networks and HealthModels, Methods, and Applications$
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Thomas W. Valente

Print publication date: 2010

Print ISBN-13: 9780195301014

Published to Oxford Scholarship Online: May 2010

DOI: 10.1093/acprof:oso/9780195301014.001.0001

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Groups

Groups

Chapter:
(p.100) 6 Groups
Source:
Social Networks and Health
Author(s):

Thomas W. Valente

Publisher:
Oxford University Press
DOI:10.1093/acprof:oso/9780195301014.003.0006

This chapter describes how network analysts define and measure groups. Components are the building blocks of group definitions and consist of all the nodes connected to each other through any number of steps in network. Nodes that cannot reach each other are in different components. More complex group definitions are then provided, namely, k-plexes and n-cliques which permit variation in the degree of connectivity among group members needed to be a group member. The Newman-Girvan (2004) algorithm is introduced which provides mutually exclusive groups and a measure of how well the group definitions characterize the data. The chapter closes with a discussion of how groups influence behavior.

Keywords:   network groups, Newman-Girvan, cliques, norms

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