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Impact factor
- 2. FOREWORD But in sciencethe credit goes to the man who convinces the world, not to the man to whom the idea first occurs. Sir Francis Darwin
- 3. JOURNAL IMPACT FACTOR- (THOMSON REUTERS) Developed in the 60’s Eugene Garfield and Irving Sher To help select journals for the SCI Journal Citation Reports first produced in 1975
- 4. JOURNAL CITATION REPORTS TheJCR provides quantitative tools for ranking, evaluating, categorizing, and comparing journals (Thomson Reuters) The Impact Factor is one of these tools Derived using citation data in the Science Citation Index and the Social Science Citation Index Helps determine a publication’s impact and influence in the global research community (Thomson Reuters) Widely accepted and used
- 5. THE IMPACT FACTOR JournalZ IF 2011= All citations from Thomsons Reuters journals in 2011 to papers in journal Z Number of citable articles published in journal Z in 2009 & 2010
- 6. THE IMPACT FACTORIntroducedin 1960’s by Eugene Garfield: ISI 2009 and 20102011 IF=5 Articles published in 2009-2010 were cited an average of 5 times in 2011. citations articles
- 7. HOW THE JIFSHOULD BE USED Wisely! Thomson doesn’t depend on it alone to assess the usefulness of journals so neither should anyone else It should be used with ‘informed peer review’ (lots of things influence citation rates)
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- 9. NEGOTIABLE PLoS Medicine, IF2-11 (8.4) Current Biology IF from 7 to 11 in 2003 Bought by Cell press in 2001
- 10. NOT REPRODUCIBLE Rockefeller UniversityPress buys their data from TR Up to 19% deviation from published records Second dataset still not correct
- 11. NOT MATHEMATICALLY SOUND Left-skeweddistributions Weak correlation of individual article citation rate with journal IF
- 12. HOW IS ‘IMPACT’MEASURED? “My article was published in a journal with an Impact Factor of 3.751” What the …?
- 13. SO, HOW COULD‘IMPACT’ BE MEASURED? Where the work is published JournalRank Citations scholarly, hyperlinks, social bookmarks Web usage Publisher platform; 3rd party locations Expert ratings F1000; Peer Reviewers; Ed Boards etc Community rating & commenting Digging; Commenting; Rating etc
- 14. SO, HOW COULD‘IMPACT’ BE MEASURED? Media/blog coverage Which sources are considered the most important? Policy development? Who published it? And where do they work? What did they publish before? How ‘impactful’ are they? Who is talking about it? And what authority do they have? Who is citing it ? And what authority do they have?
- 15. "NOT EVERYTHING THAT CANBE COUNTED COUNTS, AND NOT EVERYTHING THAT COUNTS CAN BE COUNTED." Albert Einstein
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- 17. WHAT IS AGOOD SCIENTIFIC ARTICLE? Novelty Communication
- 18. DISTILLATION Before writing ‘distillate’ yourresults to keep only 2-3 trends that show an advance versus existing knowledge.
- 19. NOVELTY How to selectthe new result? Think of: • Initial hypothesis • Hypothesis reformulation • Lab seminar • Meeting poster, oral • Scientists outside your field • Coffee breaks and friends
- 20. CLEAR If you can’texplain something simply, you don’t understand it well. Albert Einstein • Do not make science ‘secret’ • Do not use complicated words to look ‘serious’ • Editors hate abbreviations
- 21. IMAGES Draw images showing imagination Imagescommunicate 100 times better than text
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- 23. CONCLUSIONS No single ‘perfect’JIF Objective tools have a role and can contribute to the evaluation of research quality when used appropriately – must be aware of their limitations! More data sources available to rank journals Complementary metrics (usage) should be used and studied further Evaluation: expert peer review complemented by appropriate journal ranking data Ongoing debate….