The document summarizes findings from a study comparing the coverage and accuracy of Web of Science, Scopus, and Google Scholar for citation searching, author searching, and subject searching. Some key findings included Scopus indexing over 13,000 journals while Web of Science indexes under 9,000, and about half of journals are indexed in both. Subject searching was found to be limited across databases due to inconsistent integration of controlled vocabularies and lack of subject coverage evaluation tools. Author name variations and inconsistencies in addressing were found to introduce errors in citation counts and author searches. Continuous evaluation of databases was suggested to motivate vendors to improve data quality issues.

1. One Entry to Research: critical assessment of Web of Science(WoS), Scopus and Google Scholar(GS) 10.20-11.00 Thursday 31 August BIBSAM workshop, National Library, Sthlm Speaker: Lars Iselid

2. BIBSAM-project from 1/1 2006 – 31/8 2006: One Entry to Research – critical assessment of Web of Science, Scopus och Google Scholar

6. Rantapaa* 8 name variants

7. Rantapaa S* 2 additional name variants Of course much of the incorrect author spellings in Cited Ref Search could be blamed on incorrect citation information from article authors.

8. The Lancet-article? Rantapaa Dahlqvist or Rantapaa-Dahlqvist

9. The Lancet-article? Rantapaadahlqvist

10. The Lancet-article? Rantapaa-Dahlquist

11. The Lancet article! Original e-journal article

12. Lancet article in

13. Rantapaa* S

14. Lancet article in Dahlqvist, S.R.

15. Lancet article in

16. Due to all incorrect information in author and address fields I recommend to compare with a publication list from the researcher. Publication lists

18. Has AG Fisher published articles as A Fisher? 8 hits but no one by Anne G Fisher

19. Two articles with spelling A Fisher with search limits Am J Occup Ther 1987 (where address is not Umea or Colorado)

20. Two AG Fisher has published in same journal. But none with address Colorado or Umea. Right Anne Fisher! False Anne Fisher!

22. One of the articles by PO Sandman does not exist in his publication list. It’s cited 2 times in WoS.

23. These articles from WoS are not existing in the publication list of S Eriksson. 14 times cited.

24. Bad implementation of data! Address is missing for Rantapää

25. … but in the original e-journal article, it’s there!

26. Search with limit umea could produce false amount of citations!! S Astrom umea

27. S Astrom Dept ophthalmol

28. Eriksson s* umea

29. S Eriksson Umea plant sci ctr

30. S Eriksson Geriatr Ctr

31. Staffan Eriksson at the same department published as S Eriksson

33. Lost citations when using search limit author and address.

35. Lots of flaws when counting citations in Google Scholar. Many duplicates! Has no address field.

37. Multidisciplinary subject search

38. KeyWord Plus in ” Key Words Plus supplies additional search terms extracted from the titles of articles cited by authors in their bibliographies and footnotes”. ” ,,,provide a brief condensation of the major and minor themes Discussed”. Källa: www.garfield.library.upenn.edu/essays/v13p295y1990.pdf Records without references won't have KW+ - but more specifically, articles whose references are not linked to source items. In addition, it may be that those with very few linked references won't generate good candidates for KW+ either.

39. Hormone replacement therapy

40. Hormone replacement therapy in cited references of the article.

41. 29% 37,7% 17% 16% 0,3%

43. Check Major MeSH Headings in a PubMed reference

44. Breast Neoplasms/surgery* is missing!

45. Emtree terms in Embase

46. Same reference in Scopus misses Emtree terms

47. Same thing with Compendex

48. … and same reference in Scopus

50. Subject search in Google Scholar advanced search

52. Subject coverage Källa: Neuhaus, Chris et al (2006)

55. Coverage evaluation of WoS and Scopus - How many active titles? Scopus 13.226 journals WoS 8.786 journals

56. Coverage evaluation of WoS and Scopus - How many active titles overlap and how many are unique? WoS Scopus 7.210 indexed both in Scopus and WoS All together 14.802 journals with unique ISSN.

57. Coverage evaluation of WoS and Scopus - How many active titles overlap? WoS covers 55% of Scopus Scopus covers 82% of WoS 49 % exist in both

58. Active titles in each database

59. Average overlap of WoS 51,8% Scopus WoS Medline Embase Compendex PsycINFO Sociological Abstracts 55% 55% 46% 57% 36% 62%

60. Average overlap of Scopus 74,2% Scopus WoS Medline Embase Compendex PsycINFO Sociological Abstracts 82% 91% 45% 71% 67% 89%

61. Coverage evaluation Scopus and Medline - How many active titles? Scopus 13.226 journals Medline 4.843 journals

62. Coverage evaluation Scopus and Medline - How many active titles is overlapping and how many unique? Medline Scopus 4.425 are indexed by both Scopus and Medline All together 13.644 journals with unique ISSN

64. Coverage evaluation WoS vs. Medline - How many active titles? WoS 8.786 journals Medline 4.843 journals

65. Coverage evaluation WoS vs. Medline - How many active titles is overlapping and how many unique? Medline WoS 3.001 indexed By both WoS and Medline All together 10.682 journals with unique ISSN.

67. New options for author search: Scopus Author Identifier, WoS Author Finder Some improvements, some confusions!

68. Displays not just the address of the author retrieved, but also all co-authors addresses. Just displays institution, not department. Author Finder

69. Refine your results