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Google Scholar, Web of Science, and Scopus: A systematic comparison of citations in 252 subject categories

Alberto Martín-Martín, Enrique Orduna-Malea, Mike Thelwall, Emilio Delgado López-Cózar
2018 Journal of Informetrics  
Despite citation counts from Google Scholar (GS), Web of Science (WoS), and Scopus being widely consulted by researchers and sometimes used in research evaluations, there is no recent or systematic evidence  ...  In response, this paper investigates 2,448,055 citations to 2,299 English-language highly-cited documents from 252 GS subject categories published in 2006, comparing GS, the WoS Core Collection, and Scopus  ...  An international mobility grant from Universidad de Granada and CEI BioTic Granada funded a research stay at the University of Wolverhampton.  ... 
doi:10.1016/j.joi.2018.09.002 fatcat:qte7rp6j7jcfhedgizzunngygm

Google Scholar, Microsoft Academic, Scopus, Dimensions, Web of Science, and OpenCitations' COCI: a multidisciplinary comparison of coverage via citations [article]

Alberto Martín-Martín, Mike Thelwall, Enrique Orduna-Malea, Emilio Delgado López-Cózar
2020 Scientometrics   accepted
Although these have been compared to the Web of Science (WoS), Scopus, or Google Scholar, there is no systematic evidence of their differences across subject categories.  ...  A similar pattern held within most subject categories. Microsoft Academic is the second largest overall (60% of all citations), including 82% of Scopus citations and 86% of Web of Science citations.  ...  In response, this paper reports a systematic comparison of coverage of six data sources (Google Scholar, Microsoft Academic, Scopus, Dimensions, WoS, and COCI 11 ) across 252 subject categories using a  ... 
doi:10.1007/s11192-020-03690-4 pmid:32981987 pmcid:PMC7505221 arXiv:2004.14329v2 fatcat:74wpfemwznhkleebhipn5gmphe

The Journal Coverage of Web of Science, Scopus and Dimensions: A Comparative Analysis [article]

Vivek Kumar Singh, Prashasti Singh, Mousumi Karmakar, Jacqueline Leta, Philipp Mayr
2020 arXiv   pre-print
About 99.11% and 96.61% of the journals indexed in Web of Science are also indexed in Scopus and Dimensions, respectively. Scopus has 96.42% of its indexed journals also covered by Dimensions.  ...  Several previous studies have compared different databases, either through a direct comparison of article coverage or by comparing the citations across the databases.  ...  Martin-Martin et al. (2018) investigated 2,448,055 citations to 2,299 English-language highly-cited documents from 252 Google Scholar (GS) subject categories published in 2006, comparing GS, the Web of  ... 
arXiv:2011.00223v1 fatcat:cmyd7ahqhzbwlop6cccxcjvofu

Journal subject classification: intra- and inter-system discrepancies in Web Of Science and Scopus [article]

Shir Aviv-Reuven, Ariel Rosenfeld
2021 arXiv   pre-print
In this study, we set to examine both types of discrepancies in the two most widely used indexing systems - Web Of Science and Scopus.  ...  Journal classification systems use a variety of (partially) overlapping and non-exhaustive subject categories which results in many journals being classified into more than a single subject category.  ...  In Bar-Ilan (2008) WoS, Scopus and Google Scholar (GS) were compared in terms of the h-index for a specific set of researchers.  ... 
arXiv:2107.12222v1 fatcat:4bbourfk2zbtpbbo2ycbhujenm

Web of Science (WoS) and Scopus: The Titans of Bibliographic Information in Today's Academic World

Raminta Pranckutė
2021 Publications  
Web of Science (WoS) and Scopus are the two main bibliographic DBs.  ...  This overview should aid all stakeholders employing publication and citation data in selecting the most suitable DB.  ...  Acknowledgments: The author would like to express her gratitude to Ingrida Kasperaitienė (the Director of Vilnius Gediminas Technical University Library) and colleagues for provided organizational and  ... 
doi:10.3390/publications9010012 fatcat:if7tl35j2ze5vhyjfiurqrpbra

Bibliometric Study of Family Studies Journals Using Journal Impact Factors, CiteScore and H-index

Zao Liu
2021 International Journal of Librarianship (IJoL)  
The citation data were drawn from Journal Citation Reports, Scopus, and Google Scholar. The correlation analysis found strong positive relationships on the metrics.  ...  A possible explanation of noticeable discrepancy in rankings was provided, and the implications of the study for stakeholders were discussed.  ...  There have been a number of studies comparing citations from Web of Science, Scopus, and Google Scholar.  ... 
doi:10.23974/ijol.2021.vol6.1.174 fatcat:s4seejmndjek5jw5itixurn2k4

Creation of bibliometric tools for evaluation based on data from Google Scholar

Alberto Martín-Martín, Emilio Delgado López-Cózar
2019 Zenodo  
Unlike Web of Science (WoS) and Scopus, which have a selective approach to document indexing (they only index documents published in certain venues), GS follows an inclusive approach.  ...  In subsequent years, GS launched several services based on data from its document base: Google Scholar Citations (an author profile service), Google Scholar Metrics (a journal ranking service), and GSCP  ...  All articles and reviews with a DOI and published in 2009 or 2014 and covered by the three main citation indexes in the Web of Science (2,269,022 documents) were selected for study.  ... 
doi:10.5281/zenodo.3241712 fatcat:vjkjzo4zenhglji6asjl46rzly

Large coverage fluctuations in Google Scholar: a case study [article]

Alberto Martín-Martín, Emilio Delgado López-Cózar
2021 arXiv   pre-print
and a new dataset extracted in 2020.  ...  Documents from most of the larger publishers in the field disappeared from Google Scholar despite continuing to be available on the Web, which suggests an error on Google Scholar's side.  ...  Analysing a collection of citations to a sample of highly-cited documents from all subject areas collected in 2018 to compare relative differences in coverage in Google Scholar, Scopus, and Web of Science  ... 
arXiv:2102.07571v1 fatcat:ph4y6np4yngirfreagorc23qey

Can Microsoft Academic help to assess the citation impact of academic books? [article]

Kayvan Kousha, Mike Thelwall
2018 arXiv   pre-print
This paper fills this gap by comparing citations to 16,463 books from 2013-2016 in the Book Citation Index (BKCI) against automatically extracted citations from Microsoft Academic and Google Books in 17  ...  About 60% of the BKCI books had records in Microsoft Academic, varying by year and field.  ...  Because BKCI classifies books into 252 WoS subject categories, which is too fine-grained for statistical analyses (too few books per year and category, 28 on average), the OECD classification scheme was  ... 
arXiv:1808.01474v1 fatcat:cyyshmtkz5h2tgnjxuovym7tje

Why IEEE Xplore Matters for Research Trend Analysis in the Energy Sector

B. Chigarev
2021 Energy Systems Research  
Some errors were revealed in the Author Keywords in Web of Science.  ...  The paper aims to briefly compare and analyze the results of queries to IEEE Xplore and the leading abstract databases Scopus and Web of Science to identify research trends.  ...  Scopus and Web of Science.  ... 
doi:10.38028/esr.2021.03.0005 fatcat:3wn7kzn4gjdgfplfooq343bhwy

Goodreads reviews to assess the wider impacts of books

Kayvan Kousha, Mike Thelwall, Mahshid Abdoli
2017 Journal of the Association for Information Science and Technology  
Goodreads engagements were numerous enough in the Arts (85% of books had at least one), Humanities (80%) and Social Sciences (67%) for use as a source of impact evidence.  ...  Low and moderate correlations between Goodreads book metrics and scholarly or non-scholarly indicators suggest that reader feedback in Goodreads reflects the many purposes of books rather than a single  ...  In conclusion, Goodreads metrics are recommended for self-evaluations by publishers and authors in the arts, humanities and perhaps also the social sciences.  ... 
doi:10.1002/asi.23805 fatcat:afdlccjttbavlgw4uszkbg2rcq

Are wikipedia citations important evidence of the impact of scholarly articles and books?

Kayvan Kousha, Mike Thelwall
2016 Journal of the Association for Information Science and Technology  
In contrast, a third of monographs have at least one citation from Wikipedia, with the most in the arts and humanities.  ...  To test whether Wikipedia could provide new evidence about the impact of scholarly research, this article counted citations to 302,328 articles and 18,735 monographs in English indexed by Scopus in the  ...  the study compared with about 12,000 scientific journals (Web of Science core collection, 2015) and 60,000 books (The Book Citation Index in Web of Science) in the Web of Science.  ... 
doi:10.1002/asi.23694 fatcat:tchcirp6yndgbfeu65wqabkqwi

Can Google Scholar and Mendeley help to assess the scholarly impacts of dissertations? [article]

Kayvan Kousha, Mike Thelwall
2019 arXiv   pre-print
Whilst sets of journal articles are often evaluated with the help of citation counts from the Web of Science or Scopus, these do not index dissertations and so their impact is hard to assess.  ...  A fifth of the dissertations had at least one citation recorded in Google Scholar and slightly fewer had at least one Mendeley reader.  ...  Citation analysis could be useful for dissertations in theory but they are absent from the traditional citation indexes, such as the Web of Science and Scopus.  ... 
arXiv:1902.08746v1 fatcat:goyfqxed5zb6hkpa4pzbmtnswq

Citation Classics on Dental Caries: A Systematic Review

Anas Imran Arshad, Paras Ahmad, Paul M.H. Dummer, Mohammad Khursheed Alam, Jawaad Ahmed Asif, Zuliani Mahmood, Normastura Abd Rahman, Noraida Mamat
2020 European Journal of Dentistry  
Results The count of citation for each article varied in each database, that is, 175 to 2,003 in WoS, 89 to 1,981 in Scopus, and 126 to 3,492 when searched in Google Scholar.  ...  Objective A systematic search was performed for the identification and analysis of the 100 most often cited articles on dental caries and to highlight the changing trends in the field of dentistry over  ...  Rank Title of the article No. of citation (Web of Science) No. of citation (Scopus) No. of citation (Google Scholar) Citation density CCI 2019 24 Bagramian RA, Garcia-Godoy F, Volpe  ... 
doi:10.1055/s-0040-1703419 pmid:32189321 pmcid:PMC7069738 fatcat:md7vryyfinda7od44unxu4qsd4

The Differences of Publication Lag and Revisions of Conference Papers Extended Publishing to Journal Articles: In Field of Management

Yu-Hui Lu, Wen-Yau Cathy Lin
2018 Journal of Educational Media & Library Sciences  
The sample examined consisted of a total of 2,427 conference papers that were published in 2011 in nine international conferences spanning four academic fields, which were marketing, production and operations  ...  The differences between the originals and extended publications were also compared, including the changes in authorship, references, the length of articles, and the number of tables and figures.  ...  Discovery and Data Mining KDD 178 ACM International Conference on Information and Knowledge Management CIKM 428 655 2,442 Scopus Google Scholar acknowledgement Scopus Google Scholar  ... 
doi:10.6120/joemls.201807_55(2).0014.rs.bm doaj:5869d3dd859b462bab56483bd928a675 fatcat:eplsru4mhfgntk37mondq6eqzq
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