SOURCE NORMALIZED IMPACT PER PAPER (SNIP) index:
The index (normalized impact factor based on the source) is calculated by weighting the citations based on the total number of citations in the relevant subject area (the citation potential of the database in the relevant field) in order to differentiate the fields in terms of citation behavior and coverage. To be corrected in the database.
How to calculate the snap index for ranking magazines:
In calculating the Snap index, the same idea as the impact factor of magazines has been used. This means that the average citation on the article is calculated and it is deducted. Therefore, in the case of deduction, we have:
That is, the average citation on the article in a period of three years.
This value is called the raw impact factor of the journal in a given year.
In the following, the raw impact coefficient on the citation potential of the database is divided in the relevant field to correct the differences between the fields in terms of the citation behavior and also in terms of the amount of coverage in the database. Citation potential is the average number of three-year references (for example, 2006-2008) to an article in a journal.
SNIP index:
This index examines more distant citations, that is, it does not consider self-citations and colleagues' citations.
Benefits of SNIP:
♦ It is more reasonable in terms of time frame.
♦ It has a better base coverage.
♦ Including the same type of sources in counting citations and articles.
♦ Helping faculty members and researchers to find journals that have the best performance in their subject area.
♦ It has a higher value in subject areas that are less likely to be cited.