Autor/es reacciones

Isidro F. Aguillo Caño

Head of the Cybermetrics Laboratory and Deputy Technical Director of the Institute of Public Goods and Policies (IPP-CSIC)

This work does not contribute anything that was not already known. The distribution of citations in articles follows a power law that is poorly described by a mean value such as the impact factor.

To clarify: only 20% of papers will receive more actual citations than the expected value according to the journal's impact factor, while the remaining 80% will receive far fewer or even no citations.

Ninety-five per cent of journals have impact factors below 10. There will be journals defined as Q1 [first quartile] where most articles will receive 10, five or fewer citations.

The situation is even worse now, because Q1 journals already publish more than 60-70% of indexed papers, so we can hardly consider this group as synonymous with excellence.

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