Citation impact
| Part of a series on |
| Citation metrics |
|---|
| Author-level |
| Citation |
| Journal-level |
Citation impact or citation metric is a measure of how often an academic article, journal, book, author or institution is cited. Citation count is a raw score equal to the number of citations received (considered in a given citation index) while citation frequency or citation rate is a normalized value given by the ratio of citation counts to number articles published by the journal or author group during a given time period; for example, 5 citations received by 10 articles would result in a citation frequency of 0.5=5/10.
Citation metrics such as the journal impact factor or the citescore are interpreted as measures of the impact or influence of academic work and have given rise to the field of bibliometrics or scientometrics, specializing in the study of patterns of academic impact through citation analysis. The importance of journals can be measured by the average citation rate, It is used by academic institutions in decisions about academic tenure, promotion and hiring, and hence also used by authors in deciding which journal to publish in. Citation-like measures are also used in other fields that do ranking, such as Google's PageRank algorithm, software metrics, college and university rankings, and business performance indicators.