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| Ανάλυση Κοινωνικών Δικτύων× | Κεντρικότητα Εγγύτητας× | |
|---|---|---|
| Πεδίο | Ανάλυση Δικτύων | Ανάλυση Δικτύων |
| Οικογένεια | Machine learning | Machine learning |
| Έτος προέλευσης≠ | 1934 (sociometry); 1994 (modern formalization) | 1950 (formalized 1979) |
| Δημιουργός≠ | Moreno, J.L.; formalized by Wasserman & Faust | Bavelas, A.; formalized by Freeman, L. C. |
| Τύπος≠ | Structural/relational analysis framework | Node-level centrality index |
| Θεμελιώδης πηγή≠ | Wasserman, S. & Faust, K. (1994). Social Network Analysis: Methods and Applications. Cambridge University Press. ISBN: 978-0-521-38707-1 | Freeman, L. C. (1979). Centrality in social networks: Conceptual clarification. Social Networks, 1(3), 215–239. DOI ↗ |
| Εναλλακτικές ονομασίες | SNA, network analysis, sociometric analysis, relational analysis | closeness, farness-based centrality, geodesic closeness, normalized closeness centrality |
| Συναφείς≠ | 5 | 6 |
| Σύνοψη≠ | 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. | Closeness centrality measures how quickly a node can reach all others in a network by computing the inverse of its average shortest-path distance to every other node. First described by Bavelas (1950) and formally unified by Freeman (1979), it identifies nodes that can spread information or resources efficiently across the entire graph — not merely nodes with many direct contacts. |
| ScholarGateΣύνολο δεδομένων ↗ |
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