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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.


Correspondence analysis (Benzecri scaling) of citations to articles published in Science Signaling or Nature Immunology.Shown are annual numbers of citations received in post-publication years 0–4 by the two journals (black dots) associated with their source journals (blue dots). The analysis involved cites received in 2009–2014 to articles published in 2009–2012. The resulting factor scores of correspondence analysis are provided within the text of the Results chapter. Abbreviations used–SS: Science Signaling, Sc: Science, Na: Nature, NS: any of the 33 Nature series journals, NI: Nature Immunology, and Ot: other journals. The citations to the journal are identified by an abbreviation of the journal (SS or NI) together with an indication of the respective post-publication year (0–4).
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pone.0153730.g003: Correspondence analysis (Benzecri scaling) of citations to articles published in Science Signaling or Nature Immunology.Shown are annual numbers of citations received in post-publication years 0–4 by the two journals (black dots) associated with their source journals (blue dots). The analysis involved cites received in 2009–2014 to articles published in 2009–2012. The resulting factor scores of correspondence analysis are provided within the text of the Results chapter. Abbreviations used–SS: Science Signaling, Sc: Science, Na: Nature, NS: any of the 33 Nature series journals, NI: Nature Immunology, and Ot: other journals. The citations to the journal are identified by an abbreviation of the journal (SS or NI) together with an indication of the respective post-publication year (0–4).

Mentions: We next analyzed the citation network of two journals, which rank high among their fields but are not considered the best among the portfolio of their publishers, namely Science Signaling (published by the American Association for the Advancement of Science) and Nature Immunology (published by Nature Publishing Group). The correspondence analysis of the citations received by articles published by these two journals revealed that the pattern of citations in post-publication years 2–4 are marginally affected by journal self-cites, whereas citations received during post-publication year 1, and especially those received during post-publication year 0 were strongly skewed by journal self-citations. The first ordination axis, which explained 65.6% of variance in the data was highly correlated with self-cites from Science Signaling and cites received by articles published in the same journal during the post-publication year 0. The second ordination axis, which explained 33.3% of variance in the data was highly correlated with self-cites from Nature Immunology and cites received by articles published in the same journal during the post-publication year 0. Also the number of cites received from Science was somewhat higher in both journals, whereas Nature and Nature series journals were positively associated with early cites to Nature Immunology but not Science Signaling. Citations from other foreign journals did not display any difference in their kinetics between the two journals or among the years analyzed. (Fig 3).


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)

Correspondence analysis (Benzecri scaling) of citations to articles published in Science Signaling or Nature Immunology.Shown are annual numbers of citations received in post-publication years 0–4 by the two journals (black dots) associated with their source journals (blue dots). The analysis involved cites received in 2009–2014 to articles published in 2009–2012. The resulting factor scores of correspondence analysis are provided within the text of the Results chapter. Abbreviations used–SS: Science Signaling, Sc: Science, Na: Nature, NS: any of the 33 Nature series journals, NI: Nature Immunology, and Ot: other journals. The citations to the journal are identified by an abbreviation of the journal (SS or NI) together with an indication of the respective post-publication year (0–4).
© Copyright Policy
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC4835057&req=5

pone.0153730.g003: Correspondence analysis (Benzecri scaling) of citations to articles published in Science Signaling or Nature Immunology.Shown are annual numbers of citations received in post-publication years 0–4 by the two journals (black dots) associated with their source journals (blue dots). The analysis involved cites received in 2009–2014 to articles published in 2009–2012. The resulting factor scores of correspondence analysis are provided within the text of the Results chapter. Abbreviations used–SS: Science Signaling, Sc: Science, Na: Nature, NS: any of the 33 Nature series journals, NI: Nature Immunology, and Ot: other journals. The citations to the journal are identified by an abbreviation of the journal (SS or NI) together with an indication of the respective post-publication year (0–4).
Mentions: We next analyzed the citation network of two journals, which rank high among their fields but are not considered the best among the portfolio of their publishers, namely Science Signaling (published by the American Association for the Advancement of Science) and Nature Immunology (published by Nature Publishing Group). The correspondence analysis of the citations received by articles published by these two journals revealed that the pattern of citations in post-publication years 2–4 are marginally affected by journal self-cites, whereas citations received during post-publication year 1, and especially those received during post-publication year 0 were strongly skewed by journal self-citations. The first ordination axis, which explained 65.6% of variance in the data was highly correlated with self-cites from Science Signaling and cites received by articles published in the same journal during the post-publication year 0. The second ordination axis, which explained 33.3% of variance in the data was highly correlated with self-cites from Nature Immunology and cites received by articles published in the same journal during the post-publication year 0. Also the number of cites received from Science was somewhat higher in both journals, whereas Nature and Nature series journals were positively associated with early cites to Nature Immunology but not Science Signaling. Citations from other foreign journals did not display any difference in their kinetics between the two journals or among the years analyzed. (Fig 3).

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.