TABLE 2.
Glossary of terms.
| Glossary of metrics |
|---|
| Self‐citation—Self‐citation occurs in an article when an author references another of their own publications. This can be a legitimate way to reference earlier findings, but self‐citations can sometimes be unduly made in attempt to inflate an individual's citation count. |
| Article influence—The average influence of a journal's articles over the first 5 years after publication. |
| Cited half life, also known as aggregate cited half life, is a measure sometimes used to evaluate the current interest in a journal. |
| CiteScore—In any given year, the CiteScore of a journal is the number of citations received in that year and in previous 3 years, for documents published in the journal during the total period (4 years), divided by the total number of published documents (articles, reviews, conference papers, book chapters and data papers) in the journal during the same four‐year period. |
| Eigenfactor measures the number of times articles from the journal published in the past 5 years have been cited in the Journal Citation Reports (JCR) year. Like the impact factor, the Eigenfactor score is essentially a ratio of number of citations to total number of articles. |
| 5‐Year impact factor—The average number of times articles from the journal published in the past 5 years have been cited in the given Journal Citation Report (JCR) year. |
| Journal citation index—A kind of bibliographic index, an index of citations between publications, allowing the user to easily establish which later documents cite which earlier documents. |
| Journal impact factor—Impact factor is commonly used to evaluate the relative importance of a journal within its field and to measure the frequency with which the ‘average article’ in a journal has been cited in a particular time period. Journal that publishes more review articles will get highest IFs. |
| SJR—The SJR (Scientific Journal Rank) Indicator is a measure of scientific influence of scholarly journals that accounts for both the number of citations received by a journal and the importance or prestige of the journals where such citations come from. |
| SNIP—The SNIP (Source‐Normalised Impact per Paper) is a field‐normalised assessment of journal impact. SNIP scores are the ratio of a source's average citation count and ‘citation potential’. Citation potential is measured as the number of citations that a journal would be expected to receive for its subject field. Essentially, the longer the reference list of a citing publication, the lower the value of a citation originating from that publication. SNIP therefore allows for direct comparison between fields of research with different publication and citation practices. |