手法を比較

	指向性エゴネットワーク分析	有向介数中心性
分野	ネットワーク分析	ネットワーク分析
系統	Machine learning	Machine learning
提唱年	1954–2005	1977
提唱者	Barnes, J. A.; Bott, E.; extended by Everett & Borgatti	Freeman, L. C.
種類	Egocentric network method	Centrality measure (directed graph)
原典	Everett, M. G., & Borgatti, S. P. (2005). Ego network betweenness. Social Networks, 27(1), 31–38.	Freeman, L. C. (1977). A set of measures of centrality based on betweenness. Sociometry, 40(1), 35–41.
別名	directed personal network analysis, asymmetric ego network, directed egocentric network analysis, directed egonet analysis	directed BC, digraph betweenness, asymmetric betweenness centrality, directed Freeman betweenness
関連	5	5
概要	Directed ego network analysis examines the personal network of a focal node — the ego — by distinguishing the direction of each tie: who sends resources, support, or information to the ego, and to whom the ego sends them. This asymmetric perspective reveals role differentiation, dependence, and brokerage that undirected ego networks cannot capture.	Directed Betweenness Centrality extends Freeman's classic betweenness measure to directed graphs, quantifying how often a node lies on the shortest directed paths between all other pairs of nodes. It identifies gatekeepers, brokers, and bottlenecks in asymmetric flows such as information cascades, citation networks, and organizational hierarchies.