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The Evolution of Networks in Extreme and Isolated EnvironmentThis article reports on the evolution of network structure as it relates to the formal and informal aspects of social roles in well bounded, isolated groups. Research was conducted at the Amundsen-Scott South Pole Station over a 3-year period. Data was collected on crewmembers' networks of social interaction and personal advice over each of the 8.5-month winters during a time of complete isolation. In addition, data was collected on informal social role structure (e.g., instrumental leadership, expressive leadership). It was hypothesized that development and maintenance of a cohesive group structure was related to the presence of and group consensus on various informal social roles. The study found that core-periphery structures (i.e., reflecting cohesion) in winter-over groups were associated with the presence of critically important informal social roles (e.g., expressive leadership) and high group consensus on such informal roles. On the other hand, the evolution of clique structures (i.e., lack of cohesion) were associated with the absence of critical roles and a lack of consensus on these roles, particularly the critically important role of instrumental leader.
Document ID
Document Type
Johnson, Jeffrey C. (East Carolina Univ. Greenville, NC United States)
Boster, James S. (Connecticut Univ. CT United States)
Palinkas, Lawrence A. (California Univ., San Diego La Jolla, CA United States)
Date Acquired
September 7, 2013
Publication Date
January 1, 2000
Subject Category
Behavioral Sciences
Funding Number(s)
Distribution Limits
Work of the US Gov. Public Use Permitted.

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NameType 20000062463.pdf STI