The impact factor is a measure of the frequency with which the average article in a journal has been cited in a particular year.
The Journal Citation Report also lists journals and their impact factors and ranking in the context of their specific field(s).
Learn more about Journal Impact factor from Metrics Toolkit below:
The eigenfactor score is a journal-level metric that measures the number of times, in the past five years, that articles from a journal have been cited in the Journal Citation Reports (JCR). The Eigenfactor score considers which journals have contributed these citations and removes journal self-citations. Like the impact factor, the eigenfactor score is essentially a ratio of number of citations to total number of articles. Eigenfactor metrics differ from impact factors, because the former both counts citations as well as takes into account the location from which the citations appear.
The eigenfactor score:
The SNIP (source normalized impact per paper) indicator measures the average citation impact of the publications of a journal. Unlike the journal impact factor, SNIP corrects for differences in citation practices between scientific fields, thereby allowing for more accurate between-field comparisons of citation impact. It measures contextual citation impact by weighting citations based on the total number of citations in a subject field, using Scopus data.
The SJR (SCImago Journal and Country Rank) is a journal-level metric that uses citation data from Scopus to provide journal impact data. It also provides rankings by journal country of origin and numerous visual representations of journal impact data. The ranking method is based on the Google PageRank algorithm. With SJR, the subject field, quality and reputation of the journal has a direct effect on the value of a citation.
1. Go to Journal Citation Reports (see the link above), type in the name of the journal and select the matching title from the drop down list.
2. The resulting page shows impact factor for the most recent year, trends, and the impact factor calculation.
1. Go to the Eigenfactor Journal Ranking search (see the link above).
2. The resulting page shows the Eigenfactor score (EF) and the Article Influence (AI) score.
1. Go to Scopus (see the link above)
2.Click on Sources above the search box.
3. Type in the name of the journal and select it from the dropdown list that appears as you type. Click on Find sources.
4. The source details provides metrics about the journal, including SNIP, SJR, and CiteScore.
1. Go to Scopus (see the link above).
2.Click on Sources above the search box.
3. Type in the name of the journal and select it from the dropdown list that appears as you type. Click on Find sources.
4. The source details provides metrics about the journal, including SNIP, SJR, and CiteScore.
