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Citation indicators

Research evaluation in the Czech Republic and evaluation of authors in the global context uses various existing indicators to measure the prestige of journals, authors, author teams, institutions and the like. These indicators are calculated on the basis of the citation rate of a group of publications. The citation data are taken from specialized databases, which connect publications and their citations - i.e. citation databases such as Web of Science and Scopus. There are many types of indicators. Selected indicators, which are most often used, are described below.

 

Methodology of calculation of main indicators comparison

The article "A new approach to the metric of journals’ scientific prestige: The SJR indicator", https://doi.org/10.1016/j.joi.2010.03.002 gives a brief comparison of how most frequently used indicators - SJR, AIS and IF are calculated. The table below was taken from the article and supplemented. The supplemented and thus non original data are written in italics. The original table is available in the mentioned article as Table 1.

  SJR AIS IF
Data source
Scopus Web of Science Web of Science
Timespan
3 years 5 years 2 years
Journal self-citations
included up to a maximum rate of 33 % excluded included
Citation weighting by the prestige of the source yes yes no
How to standardize the indicator for the number of articles in the journal The prestige of the journal divided by the total number of articles in a journal The prestige of the journal divided by the ratio of the total number of articles in the journal to the total number of articles in the database The prestige of the journal (number of citations) divided by the total number of articles in the journal

 

 

The criteria for journal indexing to WoS and Scopus

The criteria for indexing journals in WoS and Scopus are listed on the producers’ websites:

 

The criteria for indexing conference proceedings to WoS and Scopus

The criteria for indexing conference proceedings in WoS and Scopus are listed on the producers’ websites:

  • WoS
  • Scopus   Note: Scopus implements the same indexing criteria for journals and conference proceedings.