Network Methods for Social Systems Understanding
In social systems, network centrality metrics play a crucial role in identifying influential actors. These metrics, such as node degree, closeness centrality, and betweenness centrality, help characterize different aspects of a node's position in a network. By assessing an actor's influence based on factors like the number of relationships, speed of influence, and ability to connect others, researchers can determine the most influential actors in a given network. This analysis is essential for understanding complex social systems and their dynamics.
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Network Methods to Understand Complex Systems Part 2: Social 1 NATIONAL SOCIO-ENVIRONMENTAL SYNTHESIS CENTER
2 NATIONAL SOCIO-ENVIRONMENTAL SYNTHESIS CENTER
Network Centrality metrics what are they and why are they useful? characterize aspects of a node s positions in a network useful in identifying most influential actor* (node) *actor = person, institution, group How is an actor s influence in a network assessed? 1. Number of relationships? 2. Speed of influence? 3. Ability to connect others? There s a centrality metric for each 3 NATIONAL SOCIO-ENVIRONMENTAL SYNTHESIS CENTER
Centrality metrics node degree closeness betweenness node linked to the most other nodes (reflects # of relationships) has shortest average mean distance to all other nodes (reflects ability to influence others quickly ) falls on the shortest paths the most times (reflects bridging btw parts of network) 4 NATIONAL SOCIO-ENVIRONMENTAL SYNTHESIS CENTER
Node degree 11 7 8 6 9 15 12 10 4 5 5 16 17 14 3 13 19 18 2 1 5 NATIONAL SOCIO-ENVIRONMENTAL SYNTHESIS CENTER
Closeness centrality 11 7 8 6 9 15 12 10 10 4 5 16 17 14 3 13 19 18 2 1 6 NATIONAL SOCIO-ENVIRONMENTAL SYNTHESIS CENTER
Betweenness centrality 11 7 8 6 9 15 12 12 10 4 5 16 17 14 3 13 19 18 2 1 7 NATIONAL SOCIO-ENVIRONMENTAL SYNTHESIS CENTER
Aniak food sharing network Source: Figure 2 from Scaggs et al. 2021. Linking subsistence harvest diversity and productivity to adaptive capacity in an Alaskan food sharing network. DOI: 10.1002/ajhb.23573 8 NATIONAL SOCIO-ENVIRONMENTAL SYNTHESIS CENTER
