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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 in three Romanian physics journals published by Editura Academiei Române.Shown are annual numbers of citations received in post-publication years 0–7 by the three journals (black dots) associated with their source journals (blue dots). The analysis involved cites received in 2014 to articles published in 2007–2014. The resulting factor scores of correspondence analysis are provided within the text of the Results chapter. Abbreviations used–PRA: Proceedings of the Romanian Academy, Series A, RJP: Romanian Journal of Physics, RRP: Romanian Reports in Physics, Oth: other journals. The citations to the journal are identified by an abbreviation of the journal (PRA, RJP or RRP) together with an indication of the respective post-publication year (0–7).
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pone.0153730.g006: Correspondence analysis (Benzecri scaling) of citations to articles in three Romanian physics journals published by Editura Academiei Române.Shown are annual numbers of citations received in post-publication years 0–7 by the three journals (black dots) associated with their source journals (blue dots). The analysis involved cites received in 2014 to articles published in 2007–2014. The resulting factor scores of correspondence analysis are provided within the text of the Results chapter. Abbreviations used–PRA: Proceedings of the Romanian Academy, Series A, RJP: Romanian Journal of Physics, RRP: Romanian Reports in Physics, Oth: other journals. The citations to the journal are identified by an abbreviation of the journal (PRA, RJP or RRP) together with an indication of the respective post-publication year (0–7).

Mentions: The correspondence analysis of the citations received by articles published by these three journals (Fig 6) revealed that the pattern of citations in post-publication years 1–2 are strongly affected by cites from the journals within the network, whereas citations received during post-publications year 0 and 4–7 (i.e., outside the window used to calculate IF) were negatively correlated with the cites from any of the journals within the network (cf. also Fig 5C and 5D). The first ordination axis, which explained 68.6% of variance in the data was positively correlated with cites from all three journals within the network, and was negatively correlated with citations from foreign journals. The second ordination axis, which explained 21.9% of variance in the data was correlated with differences in a number of citation received from RRP (positive correlation) and PRA (negative correlation). Only the cites received in post-publication years 1–2 by any of the three journals, and some cites from PRA (years 3 and 7) were positively correlated with axis 1. Post-publication year 4 cites to PRA and post-publication year 3 cites to RRP were neutral in respect to axis 1, whereas all other cites displayed negative association with axis 1 similarly as cites from foreign journals did (Fig 6).


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 in three Romanian physics journals published by Editura Academiei Române.Shown are annual numbers of citations received in post-publication years 0–7 by the three journals (black dots) associated with their source journals (blue dots). The analysis involved cites received in 2014 to articles published in 2007–2014. The resulting factor scores of correspondence analysis are provided within the text of the Results chapter. Abbreviations used–PRA: Proceedings of the Romanian Academy, Series A, RJP: Romanian Journal of Physics, RRP: Romanian Reports in Physics, Oth: other journals. The citations to the journal are identified by an abbreviation of the journal (PRA, RJP or RRP) together with an indication of the respective post-publication year (0–7).
© Copyright Policy
Related In: Results  -  Collection

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

pone.0153730.g006: Correspondence analysis (Benzecri scaling) of citations to articles in three Romanian physics journals published by Editura Academiei Române.Shown are annual numbers of citations received in post-publication years 0–7 by the three journals (black dots) associated with their source journals (blue dots). The analysis involved cites received in 2014 to articles published in 2007–2014. The resulting factor scores of correspondence analysis are provided within the text of the Results chapter. Abbreviations used–PRA: Proceedings of the Romanian Academy, Series A, RJP: Romanian Journal of Physics, RRP: Romanian Reports in Physics, Oth: other journals. The citations to the journal are identified by an abbreviation of the journal (PRA, RJP or RRP) together with an indication of the respective post-publication year (0–7).
Mentions: The correspondence analysis of the citations received by articles published by these three journals (Fig 6) revealed that the pattern of citations in post-publication years 1–2 are strongly affected by cites from the journals within the network, whereas citations received during post-publications year 0 and 4–7 (i.e., outside the window used to calculate IF) were negatively correlated with the cites from any of the journals within the network (cf. also Fig 5C and 5D). The first ordination axis, which explained 68.6% of variance in the data was positively correlated with cites from all three journals within the network, and was negatively correlated with citations from foreign journals. The second ordination axis, which explained 21.9% of variance in the data was correlated with differences in a number of citation received from RRP (positive correlation) and PRA (negative correlation). Only the cites received in post-publication years 1–2 by any of the three journals, and some cites from PRA (years 3 and 7) were positively correlated with axis 1. Post-publication year 4 cites to PRA and post-publication year 3 cites to RRP were neutral in respect to axis 1, whereas all other cites displayed negative association with axis 1 similarly as cites from foreign journals did (Fig 6).

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.