Total Cites: The total number of times that a journal has been cited by all journals included in the database in the JCR year.

Journal Impact Factor™ (JIF): The Journal Impact Factor is defined as all citations to the journal in the current JCR year to items published in the previous two years, divided by the total number of scholarly items (these comprise articles, reviews, and proceedings papers) published in the journal in the previous two years. Though not a strict mathematical average, the Journal Impact Factor provides a functional approximation of the mean citation rate per citable item. A Journal Impact Factor of 1.0 means that, on average, the articles published one or two years ago have been cited one time. A Journal Impact Factor of 2.5 means that, on average, the articles published one or two years ago have been cited two and a half times. The citing works may be articles published in the same journal. However, most citing works are from different journals, proceedings, or books indexed in Web of Science Core Collection.

5 Year Impact Factor: The 5-year journal Impact Factor, available from 2007 onward, is the average number of times articles from the journal published in the past five years have been cited in the JCR year. It is calculated by dividing the number of citations in the JCR year by the total number of articles published in the five previous years.

Immediacy Index: The Immediacy Index is the average number of times an article is cited in the year it is published. The journal Immediacy Index indicates how quickly articles in a journal are cited. The aggregate Immediacy Index indicates how quickly articles in a subject category are cited. The Immediacy Index is calculated by dividing the number of citations to articles published in a given year by the number of articles published in that year. Because it is a per-article average, the Immediacy Index tends to discount the advantage of large journals over small ones. However, frequently issued journals may have an advantage because an article published early in the year has a better chance of being cited than one published later in the year. Many publications that publish infrequently or late in the year have low Immediacy Indexes. For comparing journals specializing in cutting-edge research, the immediacy index can provide a useful perspective.

Eigenfactor® Score: The Eigenfactor Score calculation is based on the number of times articles from the journal published in the past five years have been cited in the JCR year, but it also considers which journals have contributed these citations so that highly cited journals will influence the network more than lesser cited journals. References from one article in a journal to another article from the same journal are removed, so that Eigenfactor Scores are not influenced by journal self-citation.

You can learn more about Eigenfactor Score and Article Influence Score at www.eigenfactor.org. Eigenfactor Metrics, Eigenfactor Score, Article Influence® Score are Licensed Marks used with permission from the University of Washington The EigenfactorⓇ Algorithm-2008, was developed by the Metrics Eigenfactor Project: a bibliometric research project conducted by Professor Carl Bergstrom and his laboratory at University of Washington.

Journal Citation Indicator: The Journal Citation Indicator (JCI) is based on the mean category normalized citation impact (CNCI) for the journal. CNCIs are calculated at the document level and are based on citations from all documents in the three previous years and the JCR Year to articles and reviews published in the previous three years. The JCI is normalized for document type, publication year, and category. The average JCI for any category is 1. A JCI of 2 indicates that a journal is receiving twice the expected number of citations for the average journal in the category. A JCI of 0.5 indicates a journal is receiving half the expected number of citations for the average journal in the category. As citations distributions are skewed towards larger numbers of papers with fewer citations, the majority of journals in a category may have a JCI < 1. © Clarivate 2026 [/av_textblock]