Impact Factor Database is a database of records of journals indexed in Science Citation Index.It is useful for searching impact factor data of SCI indexed journals.
What is Impact Factor
Impact Factor is a measure of importance of scientific journals. It is calculated each year by the Institute for Scientific Information for those journals which it tracks, and are published in the Journal Citation Report. Impact Factors have a huge, but controversial, influence on the way published scientific research is perceived and evaluated.
- The Impact Factor is generally calculated based on a 3 year period. For example, the 2004 Impact factor for a journal would be calculated as follows:
- A = Number of times articles published in 2001-2 were cited in tracked journals during 2003
B = Number of articles published in 2001-2
2003 Impact Factor = A/B
There are some nuances to this: ISI exclude certain article types (e.g. news items, correspondence, errata) from the denominator. Also, for new journals, ISI will sometimes calculate an Impact Factor with just 2 years of data.
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