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Citation analysis Wouter Gerritsma Information Specialist Wageningen UR Library
Citation analysis  <ul><li>Citation analysis in practice </li></ul><ul><li>Some examples </li></ul><ul><li>Tips for publis...
Tools at hand <ul><li>Citation products subscribed by WUR Library  </li></ul><ul><ul><li>Journal Citation Reports (JCR)  <...
Journal Citation Reports <ul><li>Impact factor </li></ul><ul><ul><li>Quality of journals, not of articles </li></ul></ul><...
Impact factor <ul><li>Measure for the quality of journals </li></ul><ul><ul><li>“…  it is also used for assessment of the ...
50 % of articles generate nearly 90% af all citations  Seglen, P. O. (1997). Why the impact factor of journals should not ...
Web of Science <ul><li>Science Citation Index (SCI) is  the  gold standard for bibliometrics and scientometrics </li></ul>...
Retrieving citations in WoS <ul><li>General search: searches the bibliographic data: title, author, keywords, abstract, af...
Essential Science Indicators (ESI) <ul><li>Database that presents analyses of the most recent (10 years + year building) d...
How do we compare numbers? <ul><li>Scientist Z. Math has a publication from 1996 with 17 citations </li></ul><ul><li>Scien...
Baseline mathematics
Baseline Molecular Biology
Steps in citation analysis <ul><li>On the basis of authors names, all publications are checked for citations in WoS, downl...
Considerations when publishing <ul><li>Can I reach the intended audience? </li></ul><ul><li>In which database (bibliograph...
NAMES ! <ul><li>Did I spell my name correctly </li></ul><ul><ul><li>A name is a brand! </li></ul></ul><ul><li>What is the ...
 
Results
WIMEK publications and their impact 47 335 1.66 14.50 26524 1829 All years 1 30 1.41 1.76 402 228 2004 5 37 1.53 4.70 1052...
Evaluation of a research institute  1,84 2,26 2,08 2,06 Overall impact 1,73 0.57 1,70 Microbiology 1,11 1,81 1,73 Clinical...
Evaluation of candidates  0 3 0,83 0,58 0,75 346 57 e 3 16 1,94 1,69 1,86 1886 88 d 0 8 0,9 1,39 1,15 972 93 c 1 17 1,95 1...
Leestip <ul><li>Gerritsma, W.  (2006). Wetenschappers gewogen : een systeem voor citatieanalyses in de praktijk.  Informat...
 
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Citation analysis

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Presentation for GIRS

  1. 1. Citation analysis Wouter Gerritsma Information Specialist Wageningen UR Library
  2. 2. Citation analysis <ul><li>Citation analysis in practice </li></ul><ul><li>Some examples </li></ul><ul><li>Tips for publishing </li></ul>
  3. 3. Tools at hand <ul><li>Citation products subscribed by WUR Library </li></ul><ul><ul><li>Journal Citation Reports (JCR) </li></ul></ul><ul><ul><li>Web of Science (WOS) (= Science Citation Index) </li></ul></ul><ul><ul><li>Essential Science Indicators (ESI) </li></ul></ul><ul><ul><li>Scopus (new, Elsevier product) </li></ul></ul><ul><li>Free available Web services </li></ul><ul><ul><li>Google Scholar http://scholar.google.com/ </li></ul></ul><ul><ul><li>Citeseer http://citeseer.ist.psu.edu/ </li></ul></ul><ul><ul><li>Smealsearch http://smealsearch2.psu.edu/ </li></ul></ul>
  4. 4. Journal Citation Reports <ul><li>Impact factor </li></ul><ul><ul><li>Quality of journals, not of articles </li></ul></ul><ul><li>Immediacy Index </li></ul><ul><li>Cited half life </li></ul>Cited half-life 50% citations 50% citations 3 1 Immediacy index Window Impact Factor Window
  5. 5. Impact factor <ul><li>Measure for the quality of journals </li></ul><ul><ul><li>“… it is also used for assessment of the quality of individual papers, scientists and departments. For the latter a scientific basis is lacking, as we will demonstrate in this contribution” (Opthof, 1997) </li></ul></ul><ul><ul><li>Opthof, T. (1997). Sense and nonsense about the impact factor. Cardiovascular Research 33 (1): 1-7. http:// dx.doi.org /10.1016/S0008-6363(96)00215-5 </li></ul></ul>
  6. 6. 50 % of articles generate nearly 90% af all citations Seglen, P. O. (1997). Why the impact factor of journals should not be used for evaluating research. BMJ 314 (7079): 497-502. http://bmj.bmjjournals.com/cgi/content/full/314/7079/497
  7. 7. Web of Science <ul><li>Science Citation Index (SCI) is the gold standard for bibliometrics and scientometrics </li></ul><ul><li>Wageningen UR library has a subscription on SCI through Web of Science </li></ul><ul><ul><li>Limited no. of journals (ca. 8.700) </li></ul></ul><ul><ul><li>Limited search capabilities </li></ul></ul><ul><ul><li>Errors in data (~ ca. 5%) </li></ul></ul><ul><ul><li>No interpretation of results </li></ul></ul><ul><li>Coverage 1945-> </li></ul>
  8. 8. Retrieving citations in WoS <ul><li>General search: searches the bibliographic data: title, author, keywords, abstract, affiliation etc . </li></ul><ul><ul><li>Not all citations will be found </li></ul></ul><ul><li>Cited reference search: searches the reference list of publications </li></ul><ul><ul><li>Not all articles will be found, only cited articles will be found </li></ul></ul><ul><li>1 + 2 = Expanded reference search (soc. sci.) </li></ul>
  9. 9. Essential Science Indicators (ESI) <ul><li>Database that presents analyses of the most recent (10 years + year building) data from SCI </li></ul><ul><li>Comparisons between countries, institutes, researchers en journals </li></ul><ul><li>Hot papers </li></ul><ul><li>Research fronts </li></ul><ul><li>Baselines </li></ul>
  10. 10. How do we compare numbers? <ul><li>Scientist Z. Math has a publication from 1996 with 17 citations </li></ul><ul><li>Scientist M. Biology has a publication from 2003 with 24 citations </li></ul>
  11. 11. Baseline mathematics
  12. 12. Baseline Molecular Biology
  13. 13. Steps in citation analysis <ul><li>On the basis of authors names, all publications are checked for citations in WoS, downloaded to EndNote, subsequently to Access </li></ul><ul><li>Baselines are retrieved from ESI </li></ul><ul><li>Journals categories are checked in ESI </li></ul><ul><li>The three tables are linked by ISSN and category names </li></ul><ul><li>Analyses are made for authors, research groups and Institutes </li></ul>
  14. 14. Considerations when publishing <ul><li>Can I reach the intended audience? </li></ul><ul><li>In which database (bibliography) is the journal covered </li></ul><ul><li>Is it Open Access? </li></ul><ul><li>What is the journal’s impact factor </li></ul>
  15. 15. NAMES ! <ul><li>Did I spell my name correctly </li></ul><ul><ul><li>A name is a brand! </li></ul></ul><ul><li>What is the name of my research group </li></ul><ul><li>What is the name of my University </li></ul>
  16. 17. Results
  17. 18. WIMEK publications and their impact 47 335 1.66 14.50 26524 1829 All years 1 30 1.41 1.76 402 228 2004 5 37 1.53 4.70 1052 224 2003 6 38 1.57 8.33 1658 199 2002 7 36 2.11 14.83 2758 186 2001 4 31 1.55 13.35 2337 175 2000 5 32 1.53 17.03 3014 177 1999 5 39 1.47 17.85 3391 190 1998 5 37 1.90 25.04 4156 166 1997 7 30 1.83 26.88 4139 154 1996 2 35 1.87 27.62 3590 130 1995 Papers in top 1% Papers in top 10% RI Cits/ Pubs Cits Pubs Year
  18. 19. Evaluation of a research institute 1,84 2,26 2,08 2,06 Overall impact 1,73 0.57 1,70 Microbiology 1,11 1,81 1,73 Clinical medicine 1,76 1,76 Chemistry 1,09 0,44 1,55 0,91 Biology & biochemistry 3,60 3,87 3,86 3,82 Agricultural Sciences Group 3 Group 2 Group 1 All groups
  19. 20. Evaluation of candidates 0 3 0,83 0,58 0,75 346 57 e 3 16 1,94 1,69 1,86 1886 88 d 0 8 0,9 1,39 1,15 972 93 c 1 17 1,95 1,84 1,93 498 65 b 2 4 1,52 1,76 1,64 1565 80 a #papers top 1% #papers top 10% RI 1999-2003 RI 1994-1998 Relatieve Impact #Citations # Papers 1994-2003 Author
  20. 21. Leestip <ul><li>Gerritsma, W. (2006). Wetenschappers gewogen : een systeem voor citatieanalyses in de praktijk. Informatie Professional 10(10): 12-17. </li></ul><ul><ul><li>http://library.wur.nl/wasp/bestanden/LUWPUBRD_00348170_A502_001.pdf </li></ul></ul>

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