Citation Impact Center

[#1]

The data updates for the 2009 Journal Citation Reports are now available.  Thomson Reuters receives feedback from publishers after publication of the annual JCR in June. This feedback is carefully and systematically reviewed; as a result, selected JCR data may be modified.  The 2009 JCR Web data are then reloaded in September to reflect these updates and to fully incorporate all new data in the category and network metrics. 

Please note that the list of titles includes 53 journals that were absent from the June release of the JCR.  Most of these journals could not have a Journal Impact Factor calculated because one or more issues from 2007 or 2008 had not been received in time for JCR production.  Since the Journal Impact Factor denominator was incomplete for these journals they could not be included in the initial release.  This year however, the JCR Production and Publisher Relations teams at Thomson Reuters have taken a proactive approach toward claiming of missing issues, with the goal of adding these journals to the JCR update if missing content was received in time.  Realizing the importance to publishers of obtaining Impact Factors and having their journals appear in the JCR, every effort has been made to include as many journals in the update as possible. 

Because the Eigenfactor(tm) metrics are based on the citation network created across the whole JCR (Science and Social Sciences editions), the addition of new titles will affect the Eigenfactor Score(tm) and Article Influence Score(tm) for all journals. 

The list of titles affected by the data update is available at:  http://wokinfo.com/media/pdf/JCRUpdate-Sept2010.pdf

No further adjustments to the 2009 Journal Citation Reports will be made.   JCR 2010 data will be published in June 2011. 

[#2]

As seen on the prior thread...http://community.thomsonreuters.com/t5/Citation-Impact-Center/New-Titles-in-2008-JCR/bc-p/6823, I am still waiting for an explanation for why our journal has not made it into JCR.  We have been on time for 5+ years, our volume is growing, the quality of papers is very good, and by self calculating a journal h-index, we are currently the 2nd highest ranked journal in herpetology.  We would REALLY like to see our journal show up in JCR.  

M

[#3]

As seen on the prior thread...http://community.thomsonreuters.com/t5/Citation-Impact-Center/New-Titles-in-2008-JCR/bc-p/6823, I am still waiting for an explanation for why our journal has not made it into JCR.  We have been on time for 5+ years, our volume is growing, the quality of papers is very good, and by self calculating an age-based m-quotient (journal h-index corrected for age), we are currently the 2nd highest ranked journal in herpetology.  We would REALLY like to see our journal show up in JCR.  

M

[#4]

We observe the upcoming 2010 SCI impact factor of the International Journal of Cardiology, a third-rate cardiovascular journal, is likely to be more than 6.  

With regard to this strange phenomenon, we found the international journal of cardiology improves its impact factor by an improper way. We would like to explain this as follows:

The JCR provides quantitative tools (impact factor) for ranking, evaluating, categorizing, and comparing journals. The impact factor of a journal is calculated by dividing the number of current year citations (numbers of citations of all document types published during the previous two years including article, review, letter, editorial, etc.) to the source items (numbers of only 2 document types [article or review]) published in that journal during the previous two years.

Calculation for journal impact factor. 

A= number of 2010 cites to all items (including article, review, letter, editorial, etc.) published in 2008-2009

B= number of items (only the article and review type) published in 2008-2009

C= A/B = 2010 impact factor

We performed the search work using the ISI Knowledge system in Jan 23, 2011.

For the International Journal of Cardiology

2010 cites to all items published in 2008-2009 were 3395.

    Among them,  2010 cites to article/reviews published in 2008-2009 were only 1495,

                   2010 cites to letters published in 2008-2009 were 938,

                   2010 cites to a special editorial published in 2008-2009 were 894, (This editorial entitled "Ethical authorship and publishing" (2009;131(2):149-150), which introduced the Principles of Ethical Publishing in the International Journal of Cardiology, was asked to be cited by all articles in the Guide for Authors of the International Journal of Cardiology. Thus, all the 894 cites were self-citing)

                   2010 cites to other items published in 2008-2009 were 68.

All items published in 2008-2009 were 1889 (not including the meeting abstract).

    Among them,  the number of article/reviews were only 644,

                   the number of letters were 1183, (Among them, only 26 letters were traditional corresponding letters to the editor commenting the previously published article or the reply, and other 1157 letters were actually research article but published as the type of ‘letter’ [‘pseudo-letter’ articles].)

                   the number of other items were 62.

The predicted value of 2010 impact factor = 2010 cites to all items published in 2008-2009/ number of article or review published in 2008-2009 = 3395/644 = 5.27

However, the actual cites per article or review = (2010 cites to article or review published in 2008-2009 + 2010 cites to ‘pseudo-letter’ articles published in 2008-2009 / (number of article or review published in 2008-2009 + number of ‘pseudo-letter’ articles published in 2008-2009) = (1495 + 938)/(644 + 1157) = 1.35 (the actual value reflecting academic influence)

By the improper means, the International Journal of Cardiology increases its 2010 impact factor from 1.35 to 5.27.

For the American Journal of Cardiology

2010 cites to all items published in 2008-2009 were 4337.

    Among them,  2010 cites to article/reviews published in 2008-2009 were 4150,

                   2010 cites to letters published in 2008-2009 were 32,

                   2010 cites to other items published in 2008-2009 were 155.

All items published in 2008-2009 were 1524 (not including the meeting abstract).

    Among them,  the number of article/reviews were 1300,

                   the number of letters were 115, (All the letters were traditional corresponding letters to the editor commenting the previously published article or the reply)

                   the number of other items were 109.

The predicted value of 2010 impact factor = 2010 cites to all items published in 2008-2009/ number of article/reviews published in 2008-2009 = 4337/1300 = 3.34

However, the actual cites per article/reviews = (2010 cites to article or review published in 2008-2009 + 2010 cites to ‘pseudo-letter’ articles published in 2008-2009 / (number of article or review published in 2008-2009 + number of ‘pseudo-letter’ articles published in 2008-2009) = (4150+0) / (1300+0) = 3.19 (the actual value reflecting academic influence)

Thus, we believe the 2010 impact factor of the American Journal of Cardiology will be exceeded by the International Journal of Cardiology (3.34 vs. 5.27). However, the actual academic influence of the American Journal of Cardiology is far more than the International Journal of Cardiology (3.19 vs. 1.35).