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From Excessive Journal Self-Cites to Citation Stacking: Analysis of Journal Self-Citation Kinetics in Search for Journals, Which Boost Their Scientometric Indicators.

Heneberg P - PLoS ONE (2016)

Bottom Line: We found that although the kinetics of journal self-cites is generally faster compared to foreign cites, it shows some field-specific characteristics.Self-promoting journal self-citations of top-tier journals have rather indirect but negligible direct effects on bibliometric indicators, affecting just the immediacy index and marginally increasing the impact factor itself as long as the affected journals are well established in their fields.They did not receive nearly any network self-cites prior impact factor calculation window, and their network self-cites decreased sharply after the impact factor calculation window.

View Article: PubMed Central - PubMed

Affiliation: Third Faculty of Medicine, Charles University in Prague, Praha, Czech Republic.

ABSTRACT
Bibliometric indicators increasingly affect careers, funding, and reputation of individuals, their institutions and journals themselves. In contrast to author self-citations, little is known about kinetics of journal self-citations. Here we hypothesized that they may show a generalizable pattern within particular research fields or across multiple fields. We thus analyzed self-cites to 60 journals from three research fields (multidisciplinary sciences, parasitology, and information science). We also hypothesized that the kinetics of journal self-citations and citations received from other journals of the same publisher may differ from foreign citations. We analyzed the journals published the American Association for the Advancement of Science, Nature Publishing Group, and Editura Academiei Române. We found that although the kinetics of journal self-cites is generally faster compared to foreign cites, it shows some field-specific characteristics. Particularly in information science journals, the initial increase in a share of journal self-citations during post-publication year 0 was completely absent. Self-promoting journal self-citations of top-tier journals have rather indirect but negligible direct effects on bibliometric indicators, affecting just the immediacy index and marginally increasing the impact factor itself as long as the affected journals are well established in their fields. In contrast, other forms of journal self-citations and citation stacking may severely affect the impact factor, or other citation-based indices. We identified here a network consisting of three Romanian physics journals Proceedings of the Romanian Academy, Series A, Romanian Journal of Physics, and Romanian Reports in Physics, which displayed low to moderate ratio of journal self-citations, but which multiplied recently their impact factors, and were mutually responsible for 55.9%, 64.7% and 63.3% of citations within the impact factor calculation window to the three journals, respectively. They did not receive nearly any network self-cites prior impact factor calculation window, and their network self-cites decreased sharply after the impact factor calculation window. Journal self-citations and citation stacking requires increased attention and elimination from citation indices.

No MeSH data available.


Kinetics of citations to articles in three Romanian physics journals published by Editura Academiei Române.(A) Journal impact factor plotted against the part of impact factor caused by self-cites, analyzed individually for the 60 journals examined in course of this study in each year for which the JCR data were available in 2007–2014 (black circles), with highlighted position of Proceedings of the Romanian Academy, Series A (red dots). (B) Changes in JCR impact factor of the three journals published by Editura Academiei Române. (C-D) Scheme of the Editura Academiei Române network within the impact factor calculation window, i.e., in post-publication years 1–2 (C) and outside the impact factor calculation window, i.e., in post-publication years 0 and 4–7 (D). (E) Annual number of citations received by the three physics journals published by Editura Academiei Române from their network, matched with foreign citations.
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pone.0153730.g005: Kinetics of citations to articles in three Romanian physics journals published by Editura Academiei Române.(A) Journal impact factor plotted against the part of impact factor caused by self-cites, analyzed individually for the 60 journals examined in course of this study in each year for which the JCR data were available in 2007–2014 (black circles), with highlighted position of Proceedings of the Romanian Academy, Series A (red dots). (B) Changes in JCR impact factor of the three journals published by Editura Academiei Române. (C-D) Scheme of the Editura Academiei Române network within the impact factor calculation window, i.e., in post-publication years 1–2 (C) and outside the impact factor calculation window, i.e., in post-publication years 0 and 4–7 (D). (E) Annual number of citations received by the three physics journals published by Editura Academiei Române from their network, matched with foreign citations.

Mentions: We next analyzed the citation network of three Romanian physics journals published by Editura Academiei Române (Fig 5). We identified one of these journals, Proceedings of the Romanian Academy, Series A (further termed PRA), based on the analysis of raw data of Multidisciplinary sciences journals, in which it was also listed, as it displayed unusual citation kinetics and suspected citation stacking. Instead of high journal self-citation rate (Fig 5A), it displayed high numbers of cites by other journals of the same publisher, namely Romanian Journal of Physics (further termed RJP) and Romanian Reports in Physics (further termed RRP). PRA experienced recently a dramatic upwards shift of its IF and JCR ranking, being positioned in 4th quartile (46th out of 50 journals) among Multidisciplinary sciences journals in 2009, and gradually shifting up to 2nd quartile (15th out of 57 journals) in the most recent JCR edition 2014. Within the same period of time, its impact factor increased from just 0.088 to 1.658 (Fig 5B), and also the impact factor without journal self-cites gradually multiplied from 0.044 to 1.429, with all articles published in citable items and with only marginal change in the total number of articles published (39 in 2009, and 49 in 2014). Whereas the citing half-life of articles published in this journal was 7.8 years, the cited half-life was just 2.2 years according to the JCR edition 2014.


From Excessive Journal Self-Cites to Citation Stacking: Analysis of Journal Self-Citation Kinetics in Search for Journals, Which Boost Their Scientometric Indicators.

Heneberg P - PLoS ONE (2016)

Kinetics of citations to articles in three Romanian physics journals published by Editura Academiei Române.(A) Journal impact factor plotted against the part of impact factor caused by self-cites, analyzed individually for the 60 journals examined in course of this study in each year for which the JCR data were available in 2007–2014 (black circles), with highlighted position of Proceedings of the Romanian Academy, Series A (red dots). (B) Changes in JCR impact factor of the three journals published by Editura Academiei Române. (C-D) Scheme of the Editura Academiei Române network within the impact factor calculation window, i.e., in post-publication years 1–2 (C) and outside the impact factor calculation window, i.e., in post-publication years 0 and 4–7 (D). (E) Annual number of citations received by the three physics journals published by Editura Academiei Române from their network, matched with foreign citations.
© Copyright Policy
Related In: Results  -  Collection

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getmorefigures.php?uid=PMC4835057&req=5

pone.0153730.g005: Kinetics of citations to articles in three Romanian physics journals published by Editura Academiei Române.(A) Journal impact factor plotted against the part of impact factor caused by self-cites, analyzed individually for the 60 journals examined in course of this study in each year for which the JCR data were available in 2007–2014 (black circles), with highlighted position of Proceedings of the Romanian Academy, Series A (red dots). (B) Changes in JCR impact factor of the three journals published by Editura Academiei Române. (C-D) Scheme of the Editura Academiei Române network within the impact factor calculation window, i.e., in post-publication years 1–2 (C) and outside the impact factor calculation window, i.e., in post-publication years 0 and 4–7 (D). (E) Annual number of citations received by the three physics journals published by Editura Academiei Române from their network, matched with foreign citations.
Mentions: We next analyzed the citation network of three Romanian physics journals published by Editura Academiei Române (Fig 5). We identified one of these journals, Proceedings of the Romanian Academy, Series A (further termed PRA), based on the analysis of raw data of Multidisciplinary sciences journals, in which it was also listed, as it displayed unusual citation kinetics and suspected citation stacking. Instead of high journal self-citation rate (Fig 5A), it displayed high numbers of cites by other journals of the same publisher, namely Romanian Journal of Physics (further termed RJP) and Romanian Reports in Physics (further termed RRP). PRA experienced recently a dramatic upwards shift of its IF and JCR ranking, being positioned in 4th quartile (46th out of 50 journals) among Multidisciplinary sciences journals in 2009, and gradually shifting up to 2nd quartile (15th out of 57 journals) in the most recent JCR edition 2014. Within the same period of time, its impact factor increased from just 0.088 to 1.658 (Fig 5B), and also the impact factor without journal self-cites gradually multiplied from 0.044 to 1.429, with all articles published in citable items and with only marginal change in the total number of articles published (39 in 2009, and 49 in 2014). Whereas the citing half-life of articles published in this journal was 7.8 years, the cited half-life was just 2.2 years according to the JCR edition 2014.

Bottom Line: We found that although the kinetics of journal self-cites is generally faster compared to foreign cites, it shows some field-specific characteristics.Self-promoting journal self-citations of top-tier journals have rather indirect but negligible direct effects on bibliometric indicators, affecting just the immediacy index and marginally increasing the impact factor itself as long as the affected journals are well established in their fields.They did not receive nearly any network self-cites prior impact factor calculation window, and their network self-cites decreased sharply after the impact factor calculation window.

View Article: PubMed Central - PubMed

Affiliation: Third Faculty of Medicine, Charles University in Prague, Praha, Czech Republic.

ABSTRACT
Bibliometric indicators increasingly affect careers, funding, and reputation of individuals, their institutions and journals themselves. In contrast to author self-citations, little is known about kinetics of journal self-citations. Here we hypothesized that they may show a generalizable pattern within particular research fields or across multiple fields. We thus analyzed self-cites to 60 journals from three research fields (multidisciplinary sciences, parasitology, and information science). We also hypothesized that the kinetics of journal self-citations and citations received from other journals of the same publisher may differ from foreign citations. We analyzed the journals published the American Association for the Advancement of Science, Nature Publishing Group, and Editura Academiei Române. We found that although the kinetics of journal self-cites is generally faster compared to foreign cites, it shows some field-specific characteristics. Particularly in information science journals, the initial increase in a share of journal self-citations during post-publication year 0 was completely absent. Self-promoting journal self-citations of top-tier journals have rather indirect but negligible direct effects on bibliometric indicators, affecting just the immediacy index and marginally increasing the impact factor itself as long as the affected journals are well established in their fields. In contrast, other forms of journal self-citations and citation stacking may severely affect the impact factor, or other citation-based indices. We identified here a network consisting of three Romanian physics journals Proceedings of the Romanian Academy, Series A, Romanian Journal of Physics, and Romanian Reports in Physics, which displayed low to moderate ratio of journal self-citations, but which multiplied recently their impact factors, and were mutually responsible for 55.9%, 64.7% and 63.3% of citations within the impact factor calculation window to the three journals, respectively. They did not receive nearly any network self-cites prior impact factor calculation window, and their network self-cites decreased sharply after the impact factor calculation window. Journal self-citations and citation stacking requires increased attention and elimination from citation indices.

No MeSH data available.