This article reports on the evolution of network structure as it relates to formal and informal social roles in well-bounded, isolated groups. Research was conducted at the Amundsen-Scott South Pole Station. Data were collected on crewmembers' networks of social interaction over each of three winter-over periods, when the station is completely isolated. In addition, data were collectedon the informal roles played by crewmembers (e.g., instrumental leadership, expressive leadership). The study found that globally coherent networks in winter-over groups were associated with group consensus on the presence of critically important informal social roles (e.g., expressive leadership)where global coherence is the extent to which a network forms a single group composed of a unitary core and periphery as opposed to being factionalized into two or more subgroups. Conversely, the evolution of multiple subgroups was associated with the absence of consensus on critical informal social roles, above all the critically important role of instrumental leader.

中文翻译：

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极端和孤立环境中的社会角色和网络演变

本文报告了网络结构的演变，因为它与界限明确的孤立群体中的正式和非正式社会角色有关。研究是在阿蒙森-斯科特南极站进行的。当空间站完全隔离时，在三个冬季期间的每一个期间都收集了机组人员社交互动网络的数据。此外，还收集了有关机组成员所扮演的非正式角色（例如，工具型领导、表达型领导）的数据。该研究发现，越冬群体中的全球连贯网络与群体对存在至关重要的非正式社会角色（例如，表达性领导），其中全球一致性是网络形成由单一核心和外围组成的单个群体的程度，而不是被派系化为两个或多个子群体。相反，多个亚群的演变与对关键的非正式社会角色缺乏共识有关，尤其是工具型领导者至关重要的角色。