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Personal Impact Factor and H-Index Calculations: Home

Need Assistance Calculating Your Personal Impact Factor?

If you need help calculating your personal impact factor, please email us at refdesk@mssm.edu and we'll be happy to schedule an appointment with you to assist you with this task.

Definitions

Mount Sinai faculty who would like to calculate an H-index or an individual impact factor can use the Web of Science database to do so. Web of Science is the standard at Mount Sinai for calculating these values. Other citation databases, such as Scopus and Google Scholar, may provide different H-index values and citation data.

A journal impact factor is a measure of the frequency with which the average article in a journal has been cited in a particular year. It is one of the evaluation tools provided by the Thomson Reuters Journal Citation Reports® (JCR®) database. Mount Sinai uses an analogous formula to calculate individual impact factors.

Impact Factor

Journal Impact Factor =

Cites in 2014 to articles published in Journal X in 2013 and 2012
Total number of articles published in Journal X in 2013 and 2012

An individual impact factor is a measure of the average frequency with which your recent articles have been cited in a particular year.

Individual Impact Factor =

Cites in 2014 to articles you published in 2013 and 2012
Total number of articles you published in 2013 and 2012

H-Index

H-index = The number of papers (N) on a list of publications ranked in descending order by the times cited that have N or more citations.

The H-index was developed by J.E. Hirsch and published in Proceedings of the National Academy of Sciences of the United States of America 102 (46): 16569-16572 November 15 2005.

Finding the Journal Impact Factors For the Top Journals in Your Field

1.  Access the InCites Journal Citation Reports database.  If you are off-campus you will be prompted to login with your Mount Sinai username and password. 

2.  On the InCites Journal Citation Reports homepage, the default view is a list of all journals ranked by impact factor.  To narrow the list to journals in your field, use the Journal Categories option along  the left hand side of the page.  Click the checkbox next to the category (or categories) for which you wish to view the journal impact factor information.  Once you have made your selection(s), you need to scroll down and click submit.

 

You can now see the highest impact factor journals within your chosen category (or categories), listed in descending order.

Note: InCites Journal Citation Reports includes data for over 8,000 scientific journals, but does not include every journal published.    

Locating Your Articles: The First Step to Calculating Your Citation Metrics

1. Access the Web of Science database.  If you are off-campus you will be prompted to sign in with your Mount Sinai email login name and password. 

2. On the homepage, change the Topic field to Author and click the Add Another Field option. In the new field, change Topic to Document Type.   


3. In the box next to Author, type the author's last name with first and middle initials (no comma).  Consider using an asterisk after the first inital to retrieve papers where no middle initial was used.  (Ex. Levy G*). If you have a common name, you may wish to use the more sophisticated Author Search functionality, which you can find detailed instructions for here.)   In the box next to Document Type, hold down the control key to select both Article and Review from the list of document types. (This is done to your advantage in order to exclude publications such as abstracts and editorials that are not usually cited.) Under Timespan, select the years which will best retrieve all your published work (e.g. 1996 - 2014). Then click Search.


4. Review the results carefully to make sure all the results listed are your publications. If all or most of the results on the list are your works, click Create Citation Report.  If there are a few errant results, you can manually select and exclude them on the Citation Report page.  If only some of the results are for your publications, try using the Refine Results options along the left-hand side of the page to narrow down the results to only your publications.  The most useful search refiners for this purpose are Research Areas, Oganizations-Enhanced, and Source Titles.  If after using the refinement options, the results are still not satisfactory, try returning to the search page and using the more sophisticated Author Search functionality.  (Detail instructions on Author Search are available here.) Please note If you cannot find one of your articles, it may be in a journal that is not indexed by Web of Science and thus will not be included in this calculation.

 

H-Index

On the Citation Report page, you will find your H-index. The H-index in this example below is 63 because there are 63 articles by this author which have 63 or more citations. If there are articles listed that are not yours, remove them by using the checkboxes and by clicking GO.  This will remove the errant results and recalculate your H-index.

 

Calculate Your Individual Impact Factor

Use the information on the Citation Report screen to calculate your individual impact factor for 2014. 

To get started, restrict the publication years to 2012 and 2013 and click GO.  Look at the Published Items in Each Year table to determine the total number of articles published in 2012 and 2013. (In the example below, the total number of articles published in these two years is 20.) This number is the denominator you will plug in to the personal impact factor equation. 

Next, find out how many times in 2014 the articles you wrote in 2013 and 2012 were cited. This information is available both graphically and in text form on the Citation Report page.  (In the example below, the articles written by this author in 2012 and 2013 were cited 102 times in 2014.) This number is the numerator you will plug in to the personal impact factor equation.

Individual Impact Factor =

Cites in 2014 to articles you published in 2013 and 2012
Total number of articles you published in 2013 and 2012

Therefore in the personal impact factor in this example is 102 / 20 = 5.10.