Answer: Last Updated: Sep 24, 2015 Views: 79
The impact factor measures how often an average article in a journal has been cited in a particular year or period, as published in ISI (Institute for Scientific Information)/Web of Science's Journal Citation Reports (JCR). The cited half-life measures the median age of the articles that were cited in a JCR year.
If you have a Harvard University ID (HUID) or eCommons login and password, you can find out a journal's impact factor for yourself. From the Countway home page, click Web of Science.
From Web of Science, click Journal Citation Reports and search for a journal to get information on its impact factor and cited half-life by year.
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