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Mini slideshow for use in web pages at http://www.dur.ac.uk/library/research/bibliometrics/
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Part 1
Journal metrics
Journal Ranking
1955 Eugene Garfield - the idea of creating a citation
index for science to…
Journal Ranking
“eliminate the uncritical citation of fraudulent, incomplete or obsolete data by making it possible for the conscientious scholar to be aware
of criticisms of earlier papers.”Garfield, E (1955) ‘Citation Indexes for Science’ Science, New Series, Vol. 122, No. 3159, pp. 108-111
Journal Ranking1955 Eugene Garfield - the idea of measuring the “impact” of journal articles using citations
Journal Ranking1955 Eugene Garfield - the idea of measuring the “impact” of journal articles using citations
1960s Science Citation Index developed to highlight “formal, explicit linkages between papers that have particular points in common”
Journal Ranking1955 Eugene Garfield - the idea of measuring the “impact” of journal articles using citations
1960s Science Citation Index developed to highlight “formal, explicit linkages between papers that have particular points in common”
1975 Journal Citation Reports – uses WoS data to rank journals within disciplines
Journal Citation Reports
• JCRs – annual publication of journals, their impact factors and other metrics.• 10,675 titles had JIFs in 2011
Science and Social Science editions• A journal that is cited once, on
average, for each article published has a JIF of 1.
Journal Citation Reports
Citations in 2012 to all articles published by Journal X in 2011
& 2010
Number of articles that were published in Journal
X in 2011 & 2010
Journal X’s 2012 impac
t factor
=
Journal Impact Factor
Citations in 2012 (in journals indexed in Web of Science) to
all articles published by Journal X in 2011 & 2010
Number of articles (deemed to be citable by
Web of Science) that were published in Journal
X in 2011 & 2010
Journal X’s 2012 impac
t factor
=
Journal Impact Factor
Journal Ranking
(2008) Taylor and Francis LibSite Newsletter, issue 9. p. 2
Journal Ranking
(2008) Taylor and Francis LibSite Newsletter, issue 9. p. 2
The average JIF in one discipline will vary
considerably to that in another.
Journal Ranking
(2008) Taylor and Francis LibSite Newsletter, issue 9. p. 2
You cannot compare a journal in one field of
study to that in another field of study based
upon their respective JIF.
Journal Ranking
(2008) Taylor and Francis LibSite Newsletter, issue 9. p. 3
Journal Ranking
(2008) Taylor and Francis LibSite Newsletter, issue 9. p. 3
Even within a single discipline, it is difficult
to make a generalisation or
comparison across different subjects.
What you can ask…
Am I more likely to attract more citations (and assumedly reach a larger audience) in a journal with a higher JIF than a journal with a
lower JIF?
What you can ask…
Has this article attracted more , or less, citations than the average number of citations an article in the same journal might attract?
Other journal impact metrics
• Eigenfactor - http://www.eigenfactor.org/ –Web of Science data
• SCImagoJR - http://www.scimagojr.com/ – Scopus data– Includes country ranking
Image Credits[Slide 1] Via Flickr Creative Commons, by emdot. Original available at http://www.flickr.com/photos/35237093637@N01/56156364