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A multi-dimensional analysis of usage counts, Mendeley readership, and citations for journal and conference papers

Author

Listed:
  • Wencan Tian

    (Dalian University of Technology)

  • Zhichao Fang

    (Renmin University of China
    Leiden University)

  • Xianwen Wang

    (Dalian University of Technology)

  • Rodrigo Costas

    (Leiden University
    Stellenbosch University)

Abstract

This study analyzed 16,799 journal papers and 98,773 conference papers published by IEEE Xplore in 2016 to investigate the relationships among usage counts, Mendeley readership, and citations through descriptive, regression, and mediation analyses. Differences in the relationship among these metrics between journal and conference papers are also studied. Results showed that there is no significant difference between journal and conference papers in the distribution patterns and accumulation rates of the three metrics. However, the correlation coefficients of the interrelationships between the three metrics were lower in conference papers compared to journal papers. Secondly, funding, international collaboration, and open access are positively associated with all three metrics, except for the case of funding on the usage metrics of conference papers. Furthermore, early Mendeley readership is a better predictor of citations than early usage counts and performs better for journal papers. Finally, we reveal that early Mendeley readership partially mediates between early usage counts and citation counts in the journal and conference papers. The main difference is that conference papers rely more on the direct effect of early usage counts on citations. This study contributes to expanding the existing knowledge on the relationships among usage counts, Mendeley readership, and citations in journal and conference papers, providing new insights into the relationship between the three metrics through mediation analysis.

Suggested Citation

  • Wencan Tian & Zhichao Fang & Xianwen Wang & Rodrigo Costas, 2024. "A multi-dimensional analysis of usage counts, Mendeley readership, and citations for journal and conference papers," Scientometrics, Springer;Akadémiai Kiadó, vol. 129(2), pages 985-1013, February.
    • Handle: RePEc:spr:scient:v:129:y:2024:i:2:d:10.1007_s11192-023-04909-w
    DOI: 10.1007/s11192-023-04909-w
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    1. Guangyao Zhang & Yuqi Wang & Weixi Xie & Han Du & Chunlin Jiang & Xianwen Wang, 2021. "The open access usage advantage: a temporal and spatial analysis," Scientometrics, Springer;Akadémiai Kiadó, vol. 126(7), pages 6187-6199, July.
    2. E. Raguseo & Pigni, F. & Claudio Vitari, 2021. "Streams of digital data and competitive advantage: The mediation effects of process efficiency and product effectiveness," Post-Print hal-03323663, HAL.
    3. Pei-Shan Chi & Wolfgang Glänzel, 2017. "An empirical investigation of the associations among usage, scientific collaboration and citation impact," Scientometrics, Springer;Akadémiai Kiadó, vol. 112(1), pages 403-412, July.
    4. Muhammad Salman Khan & Muhammad Younas, 2017. "Analyzing readers behavior in downloading articles from IEEE digital library: a study of two selected journals in the field of education," Scientometrics, Springer;Akadémiai Kiadó, vol. 110(3), pages 1523-1537, March.
    5. Zhichao Fang & Rodrigo Costas & Wencan Tian & Xianwen Wang & Paul Wouters, 2021. "How is science clicked on Twitter? Click metrics for Bitly short links to scientific publications," Journal of the Association for Information Science & Technology, Association for Information Science & Technology, vol. 72(7), pages 918-932, July.
    6. George Vrettas & Mark Sanderson, 2015. "Conferences versus journals in computer science," Journal of the Association for Information Science & Technology, Association for Information Science & Technology, vol. 66(12), pages 2674-2684, December.
    7. Mike Thelwall & Nabeil Maflahi, 2015. "Are scholarly articles disproportionately read in their own country? An analysis of mendeley readers," Journal of the Association for Information Science & Technology, Association for Information Science & Technology, vol. 66(6), pages 1124-1135, June.
    8. Johan Bollen & Herbert Van de Sompel, 2008. "Usage impact factor: The effects of sample characteristics on usage‐based impact metrics," Journal of the American Society for Information Science and Technology, Association for Information Science & Technology, vol. 59(1), pages 136-149, January.
    9. Mehmet Mehmetoglu, 2018. "medsem: a Stata package for statistical mediation analysis," International Journal of Computational Economics and Econometrics, Inderscience Enterprises Ltd, vol. 8(1), pages 63-78.
    10. Christian Schloegl & Juan Gorraiz, 2010. "Comparison of citation and usage indicators: the case of oncology journals," Scientometrics, Springer;Akadémiai Kiadó, vol. 82(3), pages 567-580, March.
    11. Paul Kudlow & Matthew Cockerill & Danielle Toccalino & Devin Bissky Dziadyk & Alan Rutledge & Aviv Shachak & Roger S. McIntyre & Arun Ravindran & Gunther Eysenbach, 2017. "Online distribution channel increases article usage on Mendeley: a randomized controlled trial," Scientometrics, Springer;Akadémiai Kiadó, vol. 112(3), pages 1537-1556, September.
    12. Carlos Vílchez-Román & Arístides Vara-Horna, 2021. "Usage, content and citation in open access publication: any interaction effects?," Scientometrics, Springer;Akadémiai Kiadó, vol. 126(12), pages 9457-9476, December.
    13. Mike Thelwall, 2017. "Are Mendeley reader counts useful impact indicators in all fields?," Scientometrics, Springer;Akadémiai Kiadó, vol. 113(3), pages 1721-1731, December.
    14. Ruiz-Castillo Ucelay, Javier & Perianes Rodríguez, Antonio & Costas, Rodrigo, 2017. "On the quest for currencies of science: field "exc"hange rates for citations and Mendeley readership," UC3M Working papers. Economics 24026, Universidad Carlos III de Madrid. Departamento de Economía.
    15. Xuemei Li & Mike Thelwall & Dean Giustini, 2012. "Validating online reference managers for scholarly impact measurement," Scientometrics, Springer;Akadémiai Kiadó, vol. 91(2), pages 461-471, May.
    16. Cassidy R. Sugimoto & Sam Work & Vincent Larivière & Stefanie Haustein, 2017. "Scholarly use of social media and altmetrics: A review of the literature," Journal of the Association for Information Science & Technology, Association for Information Science & Technology, vol. 68(9), pages 2037-2062, September.
    17. Xianwen Wang & Chen Liu & Wenli Mao & Zhichao Fang, 2015. "Erratum to: The open access advantage considering citation, article usage and social media attention," Scientometrics, Springer;Akadémiai Kiadó, vol. 103(3), pages 1149-1149, June.
    18. Zhichao Fang & Rodrigo Costas & Paul Wouters, 2022. "User engagement with scholarly tweets of scientific papers: a large-scale and cross-disciplinary analysis," Scientometrics, Springer;Akadémiai Kiadó, vol. 127(8), pages 4523-4546, August.
    19. Zohreh Zahedi & Rodrigo Costas & Paul Wouters, 2014. "How well developed are altmetrics? A cross-disciplinary analysis of the presence of ‘alternative metrics’ in scientific publications," Scientometrics, Springer;Akadémiai Kiadó, vol. 101(2), pages 1491-1513, November.
    20. Mike Thelwall, 2018. "Early Mendeley readers correlate with later citation counts," Scientometrics, Springer;Akadémiai Kiadó, vol. 115(3), pages 1231-1240, June.
    21. Wolfgang Glänzel & Juan Gorraiz, 2015. "Usage metrics versus altmetrics: confusing terminology?," Scientometrics, Springer;Akadémiai Kiadó, vol. 102(3), pages 2161-2164, March.
    22. Christian Schlögl & Juan Gorraiz & Christian Gumpenberger & Kris Jack & Peter Kraker, 2014. "Comparison of downloads, citations and readership data for two information systems journals," Scientometrics, Springer;Akadémiai Kiadó, vol. 101(2), pages 1113-1128, November.
    23. Stefanie Haustein & Isabella Peters & Cassidy R. Sugimoto & Mike Thelwall & Vincent Larivière, 2014. "Tweeting biomedicine: An analysis of tweets and citations in the biomedical literature," Journal of the Association for Information Science & Technology, Association for Information Science & Technology, vol. 65(4), pages 656-669, April.
    24. Xianwen Wang & Chen Liu & Wenli Mao & Zhichao Fang, 2015. "The open access advantage considering citation, article usage and social media attention," Scientometrics, Springer;Akadémiai Kiadó, vol. 103(2), pages 555-564, May.
    25. Zohreh Zahedi & Rodrigo Costas & Paul Wouters, 2017. "Mendeley readership as a filtering tool to identify highly cited publications," Journal of the Association for Information Science & Technology, Association for Information Science & Technology, vol. 68(10), pages 2511-2521, October.
    26. Xianwen Wang & Wenli Mao & Shenmeng Xu & Chunbo Zhang, 2014. "Usage history of scientific literature: Nature metrics and metrics of Nature publications," Scientometrics, Springer;Akadémiai Kiadó, vol. 98(3), pages 1923-1933, March.
    27. Vicente P. Guerrero-Bote & Félix Moya-Anegón, 2014. "Relationship between downloads and citations at journal and paper levels, and the influence of language," Scientometrics, Springer;Akadémiai Kiadó, vol. 101(2), pages 1043-1065, November.
    28. Mike Thelwall & Kayvan Kousha, 2017. "ResearchGate articles: Age, discipline, audience size, and impact," Journal of the Association for Information Science & Technology, Association for Information Science & Technology, vol. 68(2), pages 468-479, February.
    29. Wolfgang Glänzel & Pei-Shan Chi, 2020. "The big challenge of Scientometrics 2.0: exploring the broader impact of scientific research in public health," Scientometrics, Springer;Akadémiai Kiadó, vol. 125(2), pages 1011-1031, November.
    30. Waltman, Ludo, 2016. "A review of the literature on citation impact indicators," Journal of Informetrics, Elsevier, vol. 10(2), pages 365-391.
    31. Barbara McGillivray & Mathias Astell, 2019. "The relationship between usage and citations in an open access mega-journal," Scientometrics, Springer;Akadémiai Kiadó, vol. 121(2), pages 817-838, November.
    32. Jin-kun Wan & Ping-huan Hua & Ronald Rousseau & Xiu-kun Sun, 2010. "The journal download immediacy index (DII): experiences using a Chinese full-text database," Scientometrics, Springer;Akadémiai Kiadó, vol. 82(3), pages 555-566, March.
    33. Pei-Shan Chi & Juan Gorraiz & Wolfgang Glänzel, 2019. "Comparing capture, usage and citation indicators: an altmetric analysis of journal papers in chemistry disciplines," Scientometrics, Springer;Akadémiai Kiadó, vol. 120(3), pages 1461-1473, September.
    34. Ritu Singh & Parikshit Charan & Manojit Chattopadhyay, 2023. "Relational capabilities and performance: examining the moderation-mediation effect of organisation structures and dynamic capability," Knowledge Management Research & Practice, Taylor & Francis Journals, vol. 21(1), pages 92-106, January.
    35. Liwen Vaughan & Juan Tang & Rongbin Yang, 2017. "Investigating disciplinary differences in the relationships between citations and downloads," Scientometrics, Springer;Akadémiai Kiadó, vol. 111(3), pages 1533-1545, June.
    36. Wang, Zhiqi & Chen, Yue & Glänzel, Wolfgang, 2020. "Preprints as accelerator of scholarly communication: An empirical analysis in Mathematics," Journal of Informetrics, Elsevier, vol. 14(4).
    37. Yang Ding & Xianlei Dong & Yi Bu & Bin Zhang & Kexin Lin & Beibei Hu, 2021. "Revisiting the relationship between downloads and citations: a perspective from papers with different citation patterns in the case of the Lancet," Scientometrics, Springer;Akadémiai Kiadó, vol. 126(9), pages 7609-7621, September.
    38. Yu Geng & Renmeng Cao & Xiaopu Han & Wencan Tian & Guangyao Zhang & Xianwen Wang, 2022. "Scientists are working overtime: when do scientists download scientific papers?," Scientometrics, Springer;Akadémiai Kiadó, vol. 127(11), pages 6413-6429, November.
    39. Kim Holmberg & Juha Hedman & Timothy D. Bowman & Fereshteh Didegah & Mikael Laakso, 2020. "Do articles in open access journals have more frequent altmetric activity than articles in subscription-based journals? An investigation of the research output of Finnish universities," Scientometrics, Springer;Akadémiai Kiadó, vol. 122(1), pages 645-659, January.
    40. Zahedi, Zohreh & Haustein, Stefanie, 2018. "On the relationships between bibliographic characteristics of scientific documents and citation and Mendeley readership counts: A large-scale analysis of Web of Science publications," Journal of Informetrics, Elsevier, vol. 12(1), pages 191-202.
    41. Michael Taylor, 2023. "Slow, slow, quick, quick, slow: five altmetric sources observed over a decade show evolving trends, by research age, attention source maturity and open access status," Scientometrics, Springer;Akadémiai Kiadó, vol. 128(4), pages 2175-2200, April.
    42. Ehsan Mohammadi & Mike Thelwall & Kayvan Kousha, 2016. "Can Mendeley bookmarks reflect readership? A survey of user motivations," Journal of the Association for Information Science & Technology, Association for Information Science & Technology, vol. 67(5), pages 1198-1209, May.
    43. E. Raguseo & Pigni, F. & Claudio Vitari, 2021. "Streams of digital data and competitive advantage: The mediation effects of process efficiency and product effectiveness," Grenoble Ecole de Management (Post-Print) hal-03323663, HAL.
    44. Xianwen Wang & Zhichao Fang & Xiaoling Sun, 2016. "Usage patterns of scholarly articles on Web of Science: a study on Web of Science usage count," Scientometrics, Springer;Akadémiai Kiadó, vol. 109(2), pages 917-926, November.
    45. Anthony Breitzman, 2021. "The relationship between web usage and citation statistics for electronics and information technology articles," Scientometrics, Springer;Akadémiai Kiadó, vol. 126(3), pages 2085-2105, March.
    46. Pei-Shan Chi & Wolfgang Glänzel, 2018. "Comparison of citation and usage indicators in research assessment in scientific disciplines and journals," Scientometrics, Springer;Akadémiai Kiadó, vol. 116(1), pages 537-554, July.
    47. Kuku Joseph Aduku & Mike Thelwall & Kayvan Kousha, 2017. "Do Mendeley reader counts reflect the scholarly impact of conference papers? An investigation of computer science and engineering," Scientometrics, Springer;Akadémiai Kiadó, vol. 112(1), pages 573-581, July.
    48. Saeideh Ebrahimy & Jafar Mehrad & Fatemeh Setareh & Massoud Hosseinchari, 2016. "Path analysis of the relationship between visibility and citation: the mediating roles of save, discussion, and recommendation metrics," Scientometrics, Springer;Akadémiai Kiadó, vol. 109(3), pages 1497-1510, December.
    49. Xinshu Zhao & John G. Lynch & Qimei Chen, 2010. "Reconsidering Baron and Kenny: Myths and Truths about Mediation Analysis," Journal of Consumer Research, Journal of Consumer Research Inc., vol. 37(2), pages 197-206, August.
    50. Diana Hicks & Paul Wouters & Ludo Waltman & Sarah de Rijcke & Ismael Rafols, 2015. "Bibliometrics: The Leiden Manifesto for research metrics," Nature, Nature, vol. 520(7548), pages 429-431, April.
    51. Álvarez-Bornstein, Belén & Bordons, María, 2021. "Is funding related to higher research impact? Exploring its relationship and the mediating role of collaboration in several disciplines," Journal of Informetrics, Elsevier, vol. 15(1).
    52. Zohreh Zahedi & Rodrigo Costas, 2018. "General discussion of data quality challenges in social media metrics: Extensive comparison of four major altmetric data aggregators," PLOS ONE, Public Library of Science, vol. 13(5), pages 1-27, May.
    53. Mojisola Erdt & Aarthy Nagarajan & Sei-Ching Joanna Sin & Yin-Leng Theng, 2016. "Altmetrics: an analysis of the state-of-the-art in measuring research impact on social media," Scientometrics, Springer;Akadémiai Kiadó, vol. 109(2), pages 1117-1166, November.
    54. Zhichao Fang & Rodrigo Costas & Wencan Tian & Xianwen Wang & Paul Wouters, 2020. "An extensive analysis of the presence of altmetric data for Web of Science publications across subject fields and research topics," Scientometrics, Springer;Akadémiai Kiadó, vol. 124(3), pages 2519-2549, September.
    55. Ehsan Mohammadi & Mike Thelwall, 2014. "Mendeley readership altmetrics for the social sciences and humanities: Research evaluation and knowledge flows," Journal of the Association for Information Science & Technology, Association for Information Science & Technology, vol. 65(8), pages 1627-1638, August.
    56. Zhichao Fang & Jonathan Dudek & Rodrigo Costas, 2020. "The stability of Twitter metrics: A study on unavailable Twitter mentions of scientific publications," Journal of the Association for Information Science & Technology, Association for Information Science & Technology, vol. 71(12), pages 1455-1469, December.
    57. Ehsan Mohammadi & Mike Thelwall & Stefanie Haustein & Vincent Larivière, 2015. "Who reads research articles? An altmetrics analysis of Mendeley user categories," Journal of the Association for Information Science & Technology, Association for Information Science & Technology, vol. 66(9), pages 1832-1846, September.
    58. Yunxue Cui & Yongzhen Wang & Xiaozhong Liu & Xianwen Wang & Xuhong Zhang, 2023. "Multidimensional scholarly citations: Characterizing and understanding scholars' citation behaviors," Journal of the Association for Information Science & Technology, Association for Information Science & Technology, vol. 74(1), pages 115-127, January.
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