Abstract
Comparative studies of Web of Science and Scopus databases relate mainly to journal coverage and citation indicators. The aim of this study is to compare self-citation patterns in these databases. 25 years of scientific production (1996–2020) in Slovenia was analyzed. To offset limitations and errors of deriving data directly from databases, we used the COBISS/SciMet portal, which systematically collects records of citations with various authors identifiers for the total national scientific production. Both databases were harmonized according to the Frascati/OECD classification scheme of research fields. Self-citations were determined by comparing author identifiers rather than their names. Scopus shows better results in self-citation counts. This is mainly due to its higher coverage of local academic journals published in Slovenia and other regional journals, mostly in Humanities, where a fifth of all documents received about 3% more self-citations. In Engineering & Technology and Social Sciences, about 4% and 3% of all documents received approximately 2% more self-citations. However, these differences cause less than 3% more self-citations per researchers and two databases did not substantially differ in the relative citation ranking of researchers. Also, similar patterns of faster ageing of self-citations, rather than citations, were found in both databases, indicating a similar diminishing impact of self-citations on citations over time for all fields.
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COBISS/SciMet portal—http://scimet.izum.si/.
References
Aksnes, D. W. (2003). A macro study of self-citation. Scientometrics, 56(2), 235–246. https://doi.org/10.1023/A:1021919228368.
Baccini, A., De Nicolao, G., & Petrovich, E. (2019). Citation gaming induced by bibliometric evaluation: A country-level comparative analysis. PLoS ONE, 14(9), 1–16. https://doi.org/10.1371/journal.pone.0221212.
Bar-Ilan, J., Levene, M., & Lin, A. (2007). Some measures for comparing citation databases. Journal of Informetrics, 1(1), 26–34. https://doi.org/10.1016/j.joi.2006.08.001.
Bartol, T., Budimir, G., Dekleva-Smrekar, D., Pušnik, M., & Juznič, P. (2014). Assessment of research fields in scopus and web of Science in the view of national research evaluation in Slovenia. Scientometrics, 98(2), 1491–1504. https://doi.org/10.1007/s11192-013-1148-8.
Blagus, R., Leskošek, B. L., & Stare, J. (2015). Comparison of bibliometric measures for assessing relative importance of researchers. Scientometrics, 105(3), 1743–1762. https://doi.org/10.1007/s11192-015-1622-6.
Budimir, G., Juršnik, L., & Rachimis, P. (2016). Self-citations of publications by Slovenian researchers in web of science and scopus from 1996 to 2013. Knjižnica, 60(1), 45–60. Retrieved from http://knjiznica.zbds-zveza.si/index.php/knjiznica/article/view/561/531
Čadej, R., & Južnič, P. (2015). Slovenian research output in social sciences and humanities as represented in web of science and scopus. Knjižnica, 59(4), 43–58.
Carley, S., Porter, A. L., & Youtie, J. (2013). Toward a more precise definition of self-citation. Scientometrics, 94(2), 777–780. https://doi.org/10.1007/s11192-012-0745-2.
Chirici, G. (2012). Assessing the scientific productivity of Italian forest researchers using the Web of Science. SCOPUS and SCIMAGO databases. IForest, 5(3), 101–107. https://doi.org/10.3832/ifor0613-005.
Costas, R., van Leeuwen, T. N., & Bordons, M. (2010). Self-citations at the meso and individual levels: effects of different calculation methods. Scientometrics, 82(3), 517–537. https://doi.org/10.1007/s11192-010-0187-7.
Cumming, G. (2014). The new statistics: Why and how. Psychological Science, 25(1), 7–29. https://doi.org/10.1177/0956797613504966.
Curk, L., Budimir, G., Seljak, T., & Gerkeš, M. (2006). Povezovanje sistemov: SICRIS – COBISS.SI – web of science. Organizacija Znanja, 11(4), 230–235. https://doi.org/10.3359/oz0604230.
Demetrescu, C., Ribichini, A., & Schaerf, M. (2018). Accuracy of author names in bibliographic data sources: An Italian case study. Scientometrics, 117(3), 1777–1791. https://doi.org/10.1007/s11192-018-2945-x.
Demšar, F., & Južnič, P. (2013). Transparency of research policy and the role of librarians. Journal of Librarianship and Information Science, 46(2), 139–147. https://doi.org/10.1177/0961000613503002.
Flatt, J., Blasimme, A., & Vayena, E. (2017). Improving the measurement of scientific success by reporting a self-citation index. Publications, 5(3), 20. https://doi.org/10.3390/publications5030020.
Franceschini, F., Maisano, D., & Mastrogiacomo, L. (2016). Empirical analysis and classification of database errors in scopus and web of science. Journal of Informetrics, 10(4), 933–953. https://doi.org/10.1016/j.joi.2016.07.003.
Gasparyan, A. Y., Yessirkepov, M., Gerasimov, A. N., Kostyukova, E. I., & Kitas, G. D. (2016). Scientific author names: Errors, corrections, and identity profiles. Biochemia Medica, 26(2), 169–173. https://doi.org/10.11613/BM.2016.017.
Ghazavi, R., Taheri, B., & Ashrafi-rizi, H. (2019). Article quality indicator: Proposing a new indicator for measuring article quality in scopus and web of science. Journal of Scientometric Research, 8(1), 09–17. https://doi.org/10.5530/jscires.8.1.2.
Glänzel, W., Thijs, B., & Schlemmer, B. (2004). A bibliometric approach to the role of author self-citations in scientific communication. Scientometrics, 59(1), 63–77. https://doi.org/10.1023/B:SCIE.0000013299.38210.74.
Glänzel, W., Debackere, K., Thijs, B., & Schubert, A. (2006). A concise review on the role of author self-citations in information science, bibliometrics and science policy. Scientometrics, 67(2), 263–277. https://doi.org/10.1007/s11192-006-0098-9.
González de Dios, J., Alonso-Arroyo, A., & Aleixandre-Benavent, R. (2019). Half a century of anales de pediatría. Evolution of its main bibliometric indicators in the web of science and scopus international databases. Anales de Pediatría (English Edition), 90(3), 194.e1-194.e11. https://doi.org/10.1016/j.anpede.2018.12.002.
González-Sala, F., Osca-Lluch, J., & Haba-Osca, J. (2019). Are journal and author self-citations a visibility strategy? Scientometrics, 119(3), 1345–1364. https://doi.org/10.1007/s11192-019-03101-3.
Gul, S., Shah, T. A., & Shafiq, H. (2017). The prevalence of synchronous self-citation practices at the institutional level. Malaysian Journal of Library and Information Science, 22(1), 1–14. https://doi.org/10.22452/mjlis.vol22no1.1.
Harzing, A.-W. (2015). Health warning: might contain multiple personalities—the problem of homonyms in thomson reuters essential science indicators. Scientometrics, 105(3), 2259–2270. https://doi.org/10.1007/s11192-015-1699-y.
Harzing, A.-W., & Alakangas, S. (2016). Google scholar, scopus and the web of science: a longitudinal and cross-disciplinary comparison. Scientometrics, 106(2), 787–804. https://doi.org/10.1007/s11192-015-1798-9.
Ioannidis, J. P. A., Baas, J., Klavans, R., & Boyack, K. W. (2019). A standardized citation metrics author database annotated for scientific field. PLoS Biology, 17(8), 1–6. https://doi.org/10.1371/journal.pbio.3000384.
Kacem, A., Flatt, J. W., & Mayr, P. (2020). Tracking self-citations in academic publishing. Scientometrics, 123(2), 1157–1165. https://doi.org/10.1007/s11192-020-03413-9.
Kosmulski, M. (2020). Nobel laureates are not hot. Scientometrics. https://doi.org/10.1007/s11192-020-03378-9.
Kulkarni, A. V., Aziz, B., Shams, I., & Busse, J. W. (2011). Author self-citation in the general medicine literature. PLoS ONE. https://doi.org/10.1371/journal.pone.0020885.
Larivière, V., & Macaluso, B. (2011). Improving the coverage of social science and humanities researchers’ output: The case of the Érudit journal platform. Journal of the American Society for Information Science and Technology, 62(12), 2437–2442. https://doi.org/10.1002/asi.21632.
Leydesdorff, L., Wouters, P., & Bornmann, L. (2016). Professional and citizen bibliometrics: Complementarities and ambivalences in the development and use of indicators—a state-of-the-art report. Scientometrics, 109(3), 2129–2150. https://doi.org/10.1007/s11192-016-2150-8.
Martín-Martín, A., Orduna-Malea, E., Thelwall, M., & Delgado López-Cózar, E. (2018). Google scholar, web of science, and scopus: A systematic comparison of citations in 252 subject categories. Journal of Informetrics, 12(4), 1160–1177. https://doi.org/10.1016/j.joi.2018.09.002.
Meho, L. I., & Rogers, Y. (2008). Citation counting, citation ranking, and h -index of human-computer interaction researchers: A comparison between scopus and web of science. Journal of the American Society for Information Science and Technology, 59(11), 1711–1726. https://doi.org/10.1002/asi.
Memon, A. R., & Azim, M. E. (2019). Open researcher and contributor identifier and other author identifiers: Perspective from Pakistan. Journal of the Pakistan Medical Association, 69(6), 888–891.
Moed, H. F., Markusova, V., & Akoev, M. (2018). Trends in russian research output indexed in scopus and web of science. Scientometrics, 116(2), 1153–1180. https://doi.org/10.1007/s11192-018-2769-8.
Mongeon, P., & Paul-Hus, A. (2016). The journal coverage of web of science and scopus: A comparative analysis. Scientometrics, 106(1), 213–228. https://doi.org/10.1007/s11192-015-1765-5.
Nakagawa, S., & Cuthill, I. C. (2007). Effect size, confidence interval and statistical significance: A practical guide for biologists. Biological Reviews, 82(4), 591–605. https://doi.org/10.1111/j.1469-185X.2007.00027.x.
Ossenblok, T. L. B., Engels, T. C. E., & Sivertsen, G. (2012). The representation of the social sciences and humanities in the web of science - A comparison of publication patterns and incentive structures in Flanders and Norway (2005–9). Research Evaluation, 21(4), 280–290. https://doi.org/10.1093/reseval/rvs019.
Pajić, D. (2015). Globalization of the social sciences in Eastern Europe: Genuine breakthrough or a slippery slope of the research evaluation practice? Scientometrics, 102(3), 2131–2150. https://doi.org/10.1007/s11192-014-1510-5.
Pečlin, S., Južnič, P., Blagus, R., Sajko, M. Č, & Stare, J. (2012). Effects of international collaboration and status of journal on impact of papers. Scientometrics, 93(3), 937–948. https://doi.org/10.1007/s11192-012-0768-8.
Peroni, S., Ciancarini, P., Gangemi, A., Nuzzolese, A. G., Poggi, F., & Presutti, V. (2020). The practice of self-citations: A longitudinal study. Scientometrics, 123(1), 253–282. https://doi.org/10.1007/s11192-020-03397-6.
Shah, T. A., Gul, S., & Gaur, R. C. (2015). Authors self-citation behaviour in the field of library and information science. Aslib Journal of Information Management, 67(4), 458–468. https://doi.org/10.1108/AJIM-10-2014-0134.
Shah, S. R. U., Mahmood, K., Hameed, A. (2017). Review of Google scholar, web of science, and scopus search results: The case of inclusive education research. Library Philosophy and Practice (e-Journal). Retrieved from http://digitalcommons.unl.edu/libphilprac%0A, http://digitalcommons.unl.edu/libphilprac/1544.
Snyder, H., & Bonzi, S. (1998). Patterns of self-citation across disciplines (1980–1989). Journal of Information Science, 24(6), 431–435. https://doi.org/10.1177/016555159802400606.
Thananusak, T. (2019). Science mapping of the knowledge base on sustainable entrepreneurship, 1996–2019. Sustainability (Switzerland), 11(13), 2015–2030. https://doi.org/10.3390/su11133565.
Vinkler, P. (2007). Eminence of scientists in the light of the h -index and other scientometric indicators. Journal of Information Science, 33(4), 481–491. https://doi.org/10.1177/0165551506072165.
Walters, W. H. (2017). Citation-based journal rankings: Key questions, metrics, and data sources. IEEE Access, 5(Section V), 22036–22053. https://doi.org/10.1109/ACCESS.2017.2761400.
Waltman, L. (2016). A review of the literature on citation impact indicators. Journal of Informetrics, 10(2), 365–391. https://doi.org/10.1016/j.joi.2016.02.007.
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Conceptualization: GB, PJ; Methodology: GB; Formal analysis and investigation: GB; Writing—original draft preparation: GB, SR; Writing—review and editing: PJ, ST, GB, SR; Verification: PJ, ST; Supervision: PJ. All authors read and approved the final manuscript.
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Budimir, G., Rahimeh, S., Tamimi, S. et al. Comparison of self-citation patterns in WoS and Scopus databases based on national scientific production in Slovenia (1996–2020). Scientometrics 126, 2249–2267 (2021). https://doi.org/10.1007/s11192-021-03862-w
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DOI: https://doi.org/10.1007/s11192-021-03862-w