Publications 2013, 1(2), 78-86; doi:10.3390/publications1020078

The Normalization of Citation Counts Based on Classification Systems

1,†,* email, 2,†email and 3,†email
Received: 20 June 2013; in revised form: 19 July 2013 / Accepted: 28 July 2013 / Published: 2 August 2013
(This article belongs to the Special Issue Metrics in Publishing)
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
Abstract: If we want to assess whether the paper in question has had a particularly high or low citation impact compared to other papers, the standard practice in bibliometrics is to normalize citations in respect of the subject category and publication year. A number of proposals for an improved procedure in the normalization of citation impact have been put forward in recent years. Against the background of these proposals, this study describes an ideal solution for the normalization of citation impact: in a first step, the reference set for the publication in question is collated by means of a classification scheme, where every publication is associated with a single principal research field or subfield entry (e.g., via Chemical Abstracts sections) and a publication year. In a second step, percentiles of citation counts are calculated for this set and used to assign the normalized citation impact score to the publications (and also to the publication in question).
Keywords: bibliometrics; normalized citation indicators; percentiles
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MDPI and ACS Style

Bornmann, L.; Marx, W.; Barth, A. The Normalization of Citation Counts Based on Classification Systems. Publications 2013, 1, 78-86.

AMA Style

Bornmann L, Marx W, Barth A. The Normalization of Citation Counts Based on Classification Systems. Publications. 2013; 1(2):78-86.

Chicago/Turabian Style

Bornmann, Lutz; Marx, Werner; Barth, Andreas. 2013. "The Normalization of Citation Counts Based on Classification Systems." Publications 1, no. 2: 78-86.

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