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The impact factor relates to a specific time period; it is possible to calculate it for any desired period. For example, the JCR also includes a five-year impact factor, which is calculated by dividing the number of citations to the journal in a given year by the number of articles published in that journal in the previous five years. [14] [15]
The average impact factor environmental studies and law is around 1.5. The average impact factor for physics, pathology, ophthalmology, and medical imaging is around 2. The average impact factor for general medicine and neuroscience is around 3. The only fields with an average impact factor above 4 are astronomy and molecular and cell biology.
In any given year, the CiteScore of a journal is the number of citations, received in that year and in previous three years, for documents published in the journal during the total period (four 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: [3]
For instance, most papers in Nature (impact factor 38.1, 2016) were only cited 10 or 20 times during the reference year (see figure). Journals with a lower impact (e.g. PLOS ONE, impact factor 3.1) publish many papers that are cited 0 to 5 times but few highly cited articles. [21]
The h-index is an author-level metric that measures both the productivity and citation impact of the publications, initially used for an individual scientist or scholar. The h-index correlates with success indicators such as winning the Nobel Prize, being accepted for research fellowships and holding positions at top universities. [1]
Impact factor (2023) Published Scope ISSN Physical Review Letters: Phys. Rev. Lett. Hugues Chaté Robert Garisto Samindranath Mitra: 8.1 1958–present The full range of applied, fundamental, and interdisciplinary physics research topics ISSN 0031-9007 (print) ISSN 1079-7114 (web) Physical Review X: Phys. Rev. X: Denis Bartolo Ling Miao: 11.6 ...
Impact factor. 3.8 (2023) Standard abbreviations ... or impact. [2] In September 2016, the journal became the largest in the world by number of articles, ...
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