首页|Measuring the robustness of network community structure using assortativity

Measuring the robustness of network community structure using assortativity

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The existence of discrete social clusters, or 'communities', is a common feature of social networks in human and nonhuman animals. The level of such community structure in networks is typically measured using an index of modularity, Q. While modularity quantifies the degree to which individuals associate within versus between social communities and provides a useful measure of structure in the social network, it assumes that the network has been well sampled. However, animal social network data is typically subject to sampling errors. In particular, the associations among individuals are often not sampled equally, and animal social network studies are often based on a relatively small set of observations. Here, we extend an existing framework for bootstrapping network metrics to provide a method for assessing the robustness of community assignment in social networks using a metric we call community assortativity (r(com)). We use simulations to demonstrate that modularity can reliably detect the transition from random to structured associations in networks that differ in size and number of communities, while community assortativity accurately measures the level of confidence based on the detectability of associations. We then demonstrate the use of these metrics using three publicly available data sets of avian social networks. We suggest that by explicitly addressing the known limitations in sampling animal social network, this approach will facilitate more rigorous analyses of population-level structural patterns across social systems. (C) 2015 The Authors. Published on behalf of The Association for the Study of Animal Behaviour by Elsevier Ltd. This is an open access article under the CC BY license

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Shizuka, Daizaburo、Farine, Damien R.

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Univ Nebraska, Sch Biol Sci, 402 Manter Hall,1104 T St, Lincoln, NE 68588 USA

Univ Oxford, Dept Zool, Edward Grey Inst Field Ornithol, Oxford OX1 2JD, England|Univ Calif Davis, Dept Anthropol, Davis, CA USA|Smithsonian Trop Res Inst, Panama City, Panama|Max Planck Inst Ornithol, Dept Collect Behav, D-78457 Constance, Germany

2016

10.1016/j.anbehay.2015.12.007

Animal behaviour

Animal behaviour

SCI
ISSN：0003-3472
年,卷(期)：2016.112