Scopus indicators
Scopus is a citation database used, alongside WOS, for quantitative bibliometric analysis. The H-index is the bibliometric index for authors and CiteScore metrics, Scimago Journal Ranking, and Source-normalized Impact per Paper (SNIP) for journals.
Another tool produced by Elsevier is SciVal, a platform that analyzes bibliometric research products from the data of scientific production uploaded to Scopus.
Click here for more information on the metrics in Scopus.
Indicators used by Scopus at an article level
Citation Index ("cited by")
This is an article-level citation index, based on the content coverage of the Scopus database. An article published in a scientific journal that can be found in the database is listed next to the bibliographic reference with the expression "cited by" followed by the number of citations received.
Field-Weighted Citation Impact
This indicator shows how much the article is cited compared to similar documents. A value greater than 1.00 means that the document receives more citations than similar articles.
There are also non-citation metrics called PlumX Metrics, calculated based on usage (downloads, links), mentions in social channels, etc.
Indicators used by Scopus at a journal level
This open-access bibliometric indicator for journals was introduced by Elsevier in 2016 and it is similar to the IF.
It takes the Scopus database as the source of bibliographic data and uses the methodology of the RIP indicator (Raw Impact per Publication) developed by the Centre for Science and Technology Studies (CWTS) at Leiden University.
It measures the impact of scientific journals by dividing the number of citations received in a given year by the articles published in a journal in the four previous years by the total number of articles published in the same journal in the same four-year period.
Scimago Journal Ranking & Country Rank (SJR)
Scimago is an open-access database created in 2007 thanks tp a collaboration between some Spanish universities and the publisher Elsevier, which provides citation data from which the SJR is calculated.
This is a bibliometric indicator, alternative to the IF, which measures the influence of peer-reviewed journals based on citation data extracted from the Scopus database.
It counts the number of citations and also by weights the citations themselves, based on the prestige of the journal from which the citation originates: through an algorithm similar to Google's Pagerank, a higher weight is assigned to the journal with a high SJR.
The SJR of a journal can be searched on the platform or from the Scopus database.
Click here for more information.
Source Normalized Impact Factor (SNIP)
Created by Henk Moed in 2009 (and revised in 2012) for the CWTS of Leiden University, SNIP measures the impact of citations by normalizing them for each discipline: this allows the comparison of journals in different disciplinary areas, taking into account the citation frequency and impact speed, also checking the coverage of the database relative to the field of study. The impact of each citation, based on the data in Scupus, receives a higher value in those disciplinary areas where citations are less frequent, and vice versa.
It is based on citation data present in Scopus and considers the three years preceding the year of observation.
A description of SNIP by Henk F. Moed, who developed it, is available on Arxiv.