This journal has an impact score and impact factor:
- Impact Score 5.94
- Impact Factor 6.714 (2019)
The journal Impact Factor is the average number of times articles from the journal published in the past two years have been cited in the JCR year.
The Impact Factor is calculated by dividing the number of citations in the JCR year by the total number of articles published in the two previous years. An Impact Factor of 1.0 means that, on average, the articles published one or two year ago have been cited one time. An Impact Factor of 2.5 means that, on average, the articles published one or two year ago have been cited two and a half times. Citing articles may be from the same journal; most citing articles are from different journals.
For example, the journal PLoS Biology's 2010 impact factor is 12.472.
This was calculated thusly:
5076 - total of all citations from 2010 articles to PLoS Biology articles published in 2009 (1971) and 2008 (3105) divided by 407 - total of PLoS Biology articles published in 2009 (195) and 2008 (212) = 12.472
The number by itself does not mean as much. If you knew that the journal with the highest impact factor has the number 94.333, you might think 12.472 was quite low. But when you look at the impact factors of all the Biology journals indexed by JCR, PLoS Biology is ranked No. 1 in the Biology subject category.
Everything I am finding keeps talking about impact factor. The info of another journal makes it seem like they are the same, since only "impact score" is listed.
However, if both are listed like the first journal/link, which one should be used?