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For one, this is an average of all papers published in the journal, so a few highly cited papers considerably increase the overall impact factor of a journal, while many papers might not be cited at all.
"It has been repeatedly said that the impact factor of a journal cannot be considered as the only proxy for the quality of the work it publishes," says Monica Di Luca, vice rector of the University of Milan.
The impact factor of a journal in any given year is determined by finding the mean number of citations received in a given year for all articles published in the two preceding years (Saha et al. 2003).
Calculation of the "impact factor" of a journal is based upon the number of citations divided by the number of published articles in that particular journal for any given year.
The impact factor of a journal has empirically been shown to be associated with article quality in some studies [18] but not in others [6].
The Impact Factor of a journal has been demonstrated to be a poor predictor of the number of citations an article will finally get [50].
Similar(50)
The 1995 scientific impact factor (SIF) of a journal was used as an approximation of the prestige of a journal.
The impact factor of a publishing journal is predictive of the subsequent dissemination and likely scientific impact of its articles [21].
As this particular journal has published three papers associated with the sequences, the formula should emphasize this fact by assigning the weight 2 to this factor in detriment of a journal that has, for example zero papers published.
Journal impact factor, while indicative of a journal's prestige and likely scientific impact of its articles in aggregate, is not necessarily indicative of an individual article's scientific impact.
But the company is considering backtracking on the formula for payout, which is currently $100 times the Impact Factor of the journal, a much-maligned metric of journal importance.
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Justyna Jupowicz-Kozak
CEO of Professional Science Editing for Scientists @ prosciediting.com