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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]
Towards a Book Publishers Citation Reports. First approach using the Book Citation Index. arXiv preprint arXiv:1207.7067. Torres-Salinas, D., Robinson-García, N., Cabezas-Clavijo, Á., & Jiménez-Contreras, E. (2014). Analyzing the citation characteristics of books: edited books, book series and publisher types in the book citation index.
The impact factor (IF) or journal impact factor (JIF) of an academic journal is a scientometric index calculated by Clarivate that reflects the yearly mean number of citations of articles published in the last two years in a given journal, as indexed by Clarivate's Web of Science.
In the 1960s, Eugene Garfield invented the impact factor, a tool for ranking and evaluating journals. A journal's impact factor for a given year is the average number of citations per article published in the preceding two years. [6]
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]
Citation impact or citation rate is a measure of how many times an academic journal article or book or author is ... (impact factor 38.1, 2016) were only cited 10 or ...
There is a significant and positive correlation between the impact factor and CiteScore. However, an analysis by Elsevier , who created the journal evaluation metric CiteScore, has identified 216 journals from 70 publishers to be in the top 10 percent of the most-cited journals in their subject category based on the CiteScore while they did not ...
In addition to the network-based SJR indicator, the SJR also provides a more direct alternative to the impact factor (IF), in the form of average citations per document in a 2-year period, abbreviated as Cites per Doc. (2y). [7] [8]