Impact Factors are used within Science and Medicine as a method of rating journals and the articles published in them. An impact factor is measured by calculating the number of times articles within the journal were cited during the previous two years, divided by the number of 'citable items' (i.e. articles, letter etc) published in the journal during that time.
Impact factors are one way that researchers evaluate the quality of a paper - by seeing how 'good' the journal it is published in is, based on how many other papers have referred back to items published within that journal.
However, the impact factor is given for a journal title, so does not evaluate specific articles - an article in a journal with a high impact factor may have very few citations and vice versa.
How to find the impact factor for a journal...
Go to the e-Library and select the Find Database option.
From the A-Z list select 'W' and choose Web of Knowledge.
On the Web of Knowledge homepage select the yellow "Additional Resources" tab.
On the next screen, select "Journal Citiation Reports". From the options that appear, select "Search for a Specific Journal" and submit. Enter the journal title and click Search.
The database indexes thousands of publications, however it does not cover every journal published, so if your journal is not found then it is not covered by the Journal Citation Reports.
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