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	ソーシャルネットワーク分析	Structural Equivalence
分野	ネットワーク分析	Sociology
系統	Machine learning	Process / pipeline
提唱年	1934 (sociometry); 1994 (modern formalization)	1971
提唱者	Moreno, J.L.; formalized by Wasserman & Faust	François Lorrain & Harrison White
種類	Structural/relational analysis framework	Equivalence relation grouping actors with identical tie patterns
原典	Wasserman, S. & Faust, K. (1994). Social Network Analysis: Methods and Applications. Cambridge University Press. ISBN: 978-0-521-38707-1	Lorrain, F., & White, H. C. (1971). Structural equivalence of individuals in social networks. The Journal of Mathematical Sociology, 1(1), 49–80.
別名	SNA, network analysis, sociometric analysis, relational analysis	structural equivalence analysis, positional equivalence, Euclidean equivalence of actors, equivalence classes
関連	5	5
概要	Social Network Analysis (SNA) is a structural method that maps and measures relationships and flows between people, groups, organizations, or other entities modeled as nodes connected by ties (edges). Rather than focusing on individual attributes, SNA reveals how the pattern of connections shapes behavior, influence, information flow, and outcomes within a system.	Structural equivalence identifies actors who occupy the same position in a network because they have identical ties to identical others. Defined by François Lorrain and Harrison White in 1971, it formalizes the idea that two people are interchangeable in the social structure when they relate to exactly the same set of third parties, and it provides the foundation for partitioning networks into positions and building blockmodels.