JOURNALS: ACADEMIC RESEARCH JOURNALS: JOURNAL RANKINGS AND CITATION ANALYSIS : PERIODICALS: SCHOLARLY : RESEARCH : DATABASES: ACADEMIC AND SCHOLARLY: Journal Metrics
David P. Dillard
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JOURNALS: ACADEMIC RESEARCH JOURNALS:
JOURNAL RANKINGS AND CITATION ANALYSIS :
PERIODICALS: SCHOLARLY :
RESEARCH :
DATABASES: ACADEMIC AND SCHOLARLY:
Journal Metrics
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Journal Metrics
Sharmanedit
Journals and Biomedical Publishing
http://sharmanedit.wordpress.com/2012/04/12/journal-metrics-2/
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April 12, 2012 2 Comments
Last week a new measure of the impact of a journal was launched: Google
Scholar Metrics. So it seems like a good time to review the various
metrics available for journals.
Below I summarise six measures of journal impact: the impact factor (IF),
5-year IF, Google Scholar Metrics, SCImago Journal Rank (SJR), Source
Normalized Impact per Paper (SNIP) and Excellence in Research for
Australia (ERA) ranking. As part of the research for this post I have
found out the metrics (except 5-year IF) for a sample of 97 of the
higher-impact biomedical journals and put them into a Google Docs
spreadsheet, which can be viewed here (or on Google Docs directly here).
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Most researchers get to know the IF fairly quickly when they start to read
journals. So you probably know that an IF of 30 is high and that thousands
of journals (the long tail) have IFs below 1. But fewer people have this
kind of familiarity with the other metrics. So I have tried to estimate
what range of numbers counts as high impact for each metric. High here
means in the top 33% of my sample of 97 journals (already a high-impact
sample).
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To summarise the number that counts as high for each metric:
IF: 14
5-year IF: about 15
Google Scholar Metrics: 101
SJR: 0.53
SNIP: 3.85
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Note that I am only talking about journal metrics, not metrics for
assessing articles or researchers. As always, anyone using these figures
should make sure they are using them only to judge journals, not
individual papers or their authors (as emphasised by a European
Association of Science Editors statement in 2007). Also remember that
citations can be gamed by editors (see my previous post on the subject or
a recent Scholarly Kitchen post on a citation cartel for more details).
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Topics Covered in This Article:
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Impact factor
Five-year impact factor
Google Scholar Metrics
SCImago Journal Rank (SJR)
Source-Normalized Impact per Paper (SNIP)
Australian Research Council Ranking
Comparison of journals using these metrics
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JOURNALS: ACADEMIC RESEARCH JOURNALS:
JOURNAL RANKINGS AND CITATION ANALYSIS :
PERIODICALS: SCHOLARLY :
RESEARCH :
DATABASES: ACADEMIC AND SCHOLARLY:
Google Starts Ranking Journals
http://groups.google.com/group/educator-gold/
browse_thread/thread/f8aab0beb5c95ea5?hl=en
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A shorter URL for the above link:
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The complete article may be read at the URL above.
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Sincerely,
David Dillard
Temple University
(215) 204 - 4584
jw...@temple.edu
http://workface.com/e/daviddillard
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