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Science Research: Bibliometrics



Bibliometrics is generally regarded as the data for evaluating publications. OECD (2003) defines bibliometrics analysis as the way to use data on numbers and authors of scientific publications and on articles and the citations therein (and in patents) to measure the “output” of individuals/research teams, institutions, and countries, to identify national and international networks, and to map the development of new (multi-disciplinary) fields of science and technology.

In other words, bibliometrics measures the influence or impact in the journal literature. Some well-known metrics include citation counts, Eigenfactor score, h-index and impact factor are listed in the following section.

Visit our Research Impact guide to learn more about bibliometrics.


  1. OECD Frascati Manual, Sixth edition, 2002, Annex 7, paras, 20-22, page 203. Retrieved from



Citation Counts

The number of an individual article has been cited by others. It can also be done to get the total citation count for a specific author

To find citation counts, you can use:

WOS - citation count

GS - citation count

Eigenfactor Score

Published by, it is used to measure the journal's total importance to the scholarly community. Journals have a higher impact have larger Eigenfactor scores.


H-Index (aka Hirsch Index)

Introduced by Jorge E. Hirsch, h-index is used to measure both the productivity and impact of the work of a scholar. An h-index of 15 means that at least 25 papers of the author have 15 citations or more. Citation analytical tools such as Web of Science and Scopus can be used to find H-index.

H-index on WOS

Impact Factor (IF)

Impact Factor is one of the commonly used quantitative tools for "ranking, evaluating, categorizing, and comparing journals". It is defined as the average number of times articles from a journal has been cited in the most two recent years. While journals with high impact factors deemed to be more important that those with a lower number, certain subject disciplines have low numbers of citations and usage, so one should only compare journals within the same subject category. Also, impact factor is supplied only for journals indexed by Web of Science.

Impact Factor can be located in Journal Citation Report (JCR)

Impact Factor

SCImago Journal Rank (SJR)

Similar to Web of Science Impact Factor, SCImago provides ranking information on journals; the data is collected journals indexed by Scopus database.

SCImago Journal Rank



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