Gossip: Identifying Central Individuals in a Social Network

Abstract:
Can we identify the members of a community who are best- placed to diffuse information simply by asking a random sample of individuals? We show that boundedly-rational individuals can, simply by tracking sources of gossip, identify those who are most central in a network according to “diffusion centrality,” which nests other standard centrality measures. Testing this prediction with data from 35 Indian villages, we find that respondents accurately nominate those who are diffusion central (not just those with many friends). Moreover, these nominees are more central in the network than traditional village leaders and geographically central individuals.

Source: National Bureau of Economic Research

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The (In)compatibility of Diversity and Sense of Community.

Abstract:

Community psychologists are interested in creating contexts that promote both respect for diversity and sense of community. However, recent theoretical and empirical work has uncovered a community-diversity dialectic wherein the contextual conditions that foster respect for diversity often run in opposition to those that foster sense of community. More specifically, within neighborhoods, residential integration provides opportunities for intergroup contact that are necessary to promote respect for diversity but may prevent the formation of dense interpersonal networks that are necessary to promote sense of community. Using agent-based modeling to simulate neighborhoods and neighborhood social network formation, we explore whether the community-diversity dialectic emerges from two principles of relationship formation: homophily and proximity. The model suggests that when people form relationships with similar and nearby others, the contexts that offer opportunities to develop a respect for diversity are different from the contexts that foster a sense of community. Based on these results, we conclude with a discussion of whether it is possible to create neighborhoods that simultaneously foster respect for diversity and sense of community.

Source: Am J Community Psychol. 2013 Nov 6. [Epub ahead of print]- via PUBMed

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