Similarity measures for document mapping: A comparative study on the level of an individual scientist

Christian Sternitzke () and Isumo Bergmann
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Christian Sternitzke: Technische Universität Ilmenau
Isumo Bergmann: Universität Bremen

Scientometrics, 2009, vol. 78, issue 1, No 9, 113-130

Abstract: Abstract This paper investigates the utility of the Inclusion Index, the Jaccard Index and the Cosine Index for calculating similarities of documents, as used for mapping science and technology. It is shown that, provided that the same content is searched across various documents, the Inclusion Index generally delivers more exact results, in particular when computing the degree of similarity based on citation data. In addition, various methodologies such as co-word analysis, Subject-Action-Object (SAO) structures, bibliographic coupling, co-citation analysis, and self-citation links are compared. We find that the two former ones tend to describe rather semantic similarities that differ from knowledge flows as expressed by the citation-based methodologies.

Date: 2009
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DOI: 10.1007/s11192-007-1961-z

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