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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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Ego- and Personal-Network Effects

Ego- and Personal-Network Effects

(p.61) 4 Ego- and Personal-Network Effects
Social Networks and Health

Thomas W. Valente

Oxford University Press

This chapter shows how researchers can collect network data from randomly drawn samples. The data only represent the respondent personal network, usually from the respondent's perspective. The chapter then details the various measures derived from personal network data and the research questions and hypotheses that have been tested. Personal network exposure, concurrency, and tie strength hypotheses are discussed. A comparison between ego-centric and sociometric data is presented. The chapter discussed how to convert egocentric data to a dyadic dataset thus facilitating analysis and testing of certain hypotheses. Although ego centric data are somewhat limited, they still provide powerful measures of interpersonal influence that are strongly predictive of behavior. The chapter closed with a discussion of the application of snowball sampling including network recruitment.

Keywords:   egocentric, personal networks, dyadic data, network exposure

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