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Author Impact Factor: tracking the dynamics of individual scientific impact.

Pan RK, Fortunato S - Sci Rep (2014)

Bottom Line: However, at the end of the day one is interested in assessing the impact of individuals, rather than papers.Here we introduce Author Impact Factor (AIF), which is the extension of the IF to authors.The AIF of an author A in year t is the average number of citations given by papers published in year t to papers published by A in a period of Δt years before year t.

View Article: PubMed Central - PubMed

Affiliation: Department of Biomedical Engineering and Computational Science, Aalto University School of Science, P.O. Box 12200, FI-00076, Finland.

ABSTRACT
The impact factor (IF) of scientific journals has acquired a major role in the evaluations of the output of scholars, departments and whole institutions. Typically papers appearing in journals with large values of the IF receive a high weight in such evaluations. However, at the end of the day one is interested in assessing the impact of individuals, rather than papers. Here we introduce Author Impact Factor (AIF), which is the extension of the IF to authors. The AIF of an author A in year t is the average number of citations given by papers published in year t to papers published by A in a period of Δt years before year t. Due to its intrinsic dynamic character, AIF is capable to capture trends and variations of the impact of the scientific output of scholars in time, unlike the h-index, which is a growing measure taking into account the whole career path.

No MeSH data available.


Related in: MedlinePlus

Same as Fig. 3, for Nobel Laureates in Chemistry.Photograph of Nobel Prize Medal in Physics taken by David Monniaux. Photo released under the following licence: David Monniaux/CC BY SA 2.0.
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f4: Same as Fig. 3, for Nobel Laureates in Chemistry.Photograph of Nobel Prize Medal in Physics taken by David Monniaux. Photo released under the following licence: David Monniaux/CC BY SA 2.0.

Mentions: In Figs. 3, 4 and 5 we show the time evolution of the AIF of Nobel Prize Laureates in Physics, Chemistry and Physiology or Medicine. We report the evolution of other measures as well, for comparison. First, we consider the h-index and its yearly increment Δh. However, for most scientists the yearly increase in Δh fluctuates between 0 and 314. Most importantly, neither metric considers the current impact of a scientist, as Δh and the corresponding h-index could also increase due to papers published a long time back but only cited recently. Even the h-index for the last five years is a similar measure. It is defined as the number h5 of papers that have received at least h5 citations in the five years preceding the reference year t. These papers could have been published by the scientist at any time during his career and hence h5 does not reveal the true current impact of the scientist in those five years.


Author Impact Factor: tracking the dynamics of individual scientific impact.

Pan RK, Fortunato S - Sci Rep (2014)

Same as Fig. 3, for Nobel Laureates in Chemistry.Photograph of Nobel Prize Medal in Physics taken by David Monniaux. Photo released under the following licence: David Monniaux/CC BY SA 2.0.
© Copyright Policy - open-access
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC4017244&req=5

f4: Same as Fig. 3, for Nobel Laureates in Chemistry.Photograph of Nobel Prize Medal in Physics taken by David Monniaux. Photo released under the following licence: David Monniaux/CC BY SA 2.0.
Mentions: In Figs. 3, 4 and 5 we show the time evolution of the AIF of Nobel Prize Laureates in Physics, Chemistry and Physiology or Medicine. We report the evolution of other measures as well, for comparison. First, we consider the h-index and its yearly increment Δh. However, for most scientists the yearly increase in Δh fluctuates between 0 and 314. Most importantly, neither metric considers the current impact of a scientist, as Δh and the corresponding h-index could also increase due to papers published a long time back but only cited recently. Even the h-index for the last five years is a similar measure. It is defined as the number h5 of papers that have received at least h5 citations in the five years preceding the reference year t. These papers could have been published by the scientist at any time during his career and hence h5 does not reveal the true current impact of the scientist in those five years.

Bottom Line: However, at the end of the day one is interested in assessing the impact of individuals, rather than papers.Here we introduce Author Impact Factor (AIF), which is the extension of the IF to authors.The AIF of an author A in year t is the average number of citations given by papers published in year t to papers published by A in a period of Δt years before year t.

View Article: PubMed Central - PubMed

Affiliation: Department of Biomedical Engineering and Computational Science, Aalto University School of Science, P.O. Box 12200, FI-00076, Finland.

ABSTRACT
The impact factor (IF) of scientific journals has acquired a major role in the evaluations of the output of scholars, departments and whole institutions. Typically papers appearing in journals with large values of the IF receive a high weight in such evaluations. However, at the end of the day one is interested in assessing the impact of individuals, rather than papers. Here we introduce Author Impact Factor (AIF), which is the extension of the IF to authors. The AIF of an author A in year t is the average number of citations given by papers published in year t to papers published by A in a period of Δt years before year t. Due to its intrinsic dynamic character, AIF is capable to capture trends and variations of the impact of the scientific output of scholars in time, unlike the h-index, which is a growing measure taking into account the whole career path.

No MeSH data available.


Related in: MedlinePlus