手法を比較

	Structural Variation Analysis (Chen)	Main Path Analysis
分野	計量書誌学	計量書誌学
系統	Process / pipeline	Process / pipeline
提唱年	2012	1989
提唱者	Chaomei Chen	Norman P. Hummon & Patrick Doreian
種類	Network-perturbation pipeline predicting transformative potential	Citation-network traversal pipeline for knowledge trajectories
原典	Chen, C. (2012). Predictive effects of structural variation on citation counts. Journal of the American Society for Information Science and Technology, 63(3), 431-449.	Hummon, N. P., & Doreian, P. (1989). Connectivity in a citation network: The development of DNA theory. Social Networks, 11(1), 39-63.
別名	SVA, Structural Variation Theory, Boundary-Spanning Citation Analysis	MPA, Citation Main Path Analysis, Knowledge Flow Path Analysis
関連	3	3
概要	Structural variation analysis (SVA), developed by Chaomei Chen in 2012, is a predictive bibliometric method that estimates the transformative potential of a newly published paper from how much it perturbs the existing structure of a field's literature. Building on the idea that scientific breakthroughs typically recombine previously disconnected bodies of knowledge, SVA represents a field as a baseline co-citation network and then measures the structural change a new paper introduces by adding the novel links implied by its reference list. Papers that forge boundary-spanning connections — bridging clusters that were formerly separate — are hypothesized to be more likely to attract future citations. Chen operationalized this with metrics such as the modularity-change rate, cluster linkage, and centrality divergence, and showed that they help predict a paper's eventual citation impact, giving the field an early, structural signal of potentially high-impact work.	Main path analysis (MPA) traces the principal trajectory of knowledge development through a citation network. Introduced by Norman Hummon and Patrick Doreian in their 1989 study of the discovery of DNA, the method treats a field's literature as a directed acyclic graph in which documents point backward in time to the work they cite. Rather than mapping the whole network, MPA weights each citation link by how central it is to the flow of ideas — how many knowledge-carrying paths run through it — and then extracts the chain of most-traversed links from the field's earliest sources to its most recent sinks. The result is a compact 'main path': an ordered sequence of papers that represents the backbone along which a research front actually developed.