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| ソーシャルネットワーク分析× | Triad Census× | |
|---|---|---|
| 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) | 1970 |
| 提唱者≠ | Moreno, J.L.; formalized by Wasserman & Faust | Paul Holland & Samuel Leinhardt |
| 種類≠ | Structural/relational analysis framework | Enumeration of the 16 isomorphism classes of directed triads |
| 原典≠ | Wasserman, S. & Faust, K. (1994). Social Network Analysis: Methods and Applications. Cambridge University Press. ISBN: 978-0-521-38707-1 | Holland, P. W., & Leinhardt, S. (1970). A method for detecting structure in sociometric data. American Journal of Sociology, 76(3), 492–513. DOI ↗ |
| 別名 | SNA, network analysis, sociometric analysis, relational analysis | triad count, triadic census, 16-type triad census, MAN triad census |
| 関連≠ | 5 | 4 |
| 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. | The triad census counts how many of a directed network's three-actor subgroups fall into each of the 16 possible types of triad, providing a compact fingerprint of the network's local structure. Introduced by Paul Holland and Samuel Leinhardt in 1970, it is the standard way to test structural theories — balance, clustering, transitivity, ranked clusters — by comparing the observed distribution of triad types against what a random network would produce. |
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