Wolfram|Alpha: Computational Knowledge Engine. Change of character. Most wanted. Learn How Model Thinking Can Make You a Better Thinker. Why Nikola Tesla was the greatest geek who ever lived. Google Scholar. ACM Digital Library. Welcome to Sage. Impact factor. Calculation[edit] In any given year, the impact factor of a journal is the average number of citations received per paper published in that journal during the two preceding years.[1] For example, if a journal has an impact factor of 3 in 2008, then its papers published in 2006 and 2007 received 3 citations each on average in 2008.
The 2008 impact factor of a journal would be calculated as follows: A = the number of times that articles published in that journal in 2006 and 2007, were cited by articles in indexed journals during 2008. B = the total number of "citable items" published by that journal in 2006 and 2007. ("Citable items" are usually articles, reviews, proceedings, or notes; not editorials or letters to the editor.) 2008 impact factor = A/B. (Note that 2008 impact factors are actually published in 2009; they cannot be calculated until all of the 2008 publications have been processed by the indexing agency.) Use[edit] Criticisms[edit] Validity as a measure of importance[edit]
Crowdsortium. Springer Realtime.