What is an Impact Factor?
The Impact Factor of a given peer-reviewed article is a number which represents the prestige and influence of the journal where the article appears and the number of other researchers and change-leaders in that field who are influenced by the article. There are various sources for these Impact Factor numbers, and they change over time.
How to Find Impact Factors
A first step to find the impact factor of a journal is to Google the title of the journal where an article appears, add the phrase "impact factor". You can also use the websites below, or note the number of citations listed by journal title retrieved by Google Scholar. See examples below: