Open access publisher BioMed Central, UK, has announced that Orphanet Journal of Rare Diseases is its highest-ranking journal based on the SNIP metric, with a value of 1.31 (the median SNIP for the ~17,000 journals in Scopus is 0.52). This places the journal in the top 4 percent of all journals listed in Scopus.
For comparison, the journal's Impact Factor of 3.14 makes it the 22nd most highly-rated BioMed Central journal by Impact Factor. The contrast between these two rankings demonstrates that caution is needed when interpreting citation metrics, as much depends on the algorithm used. The SNIP provides a valuable new means to identify high quality journals in fields which may not in general be highly cited.
The Source Normalized Impact per Paper (SNIP) is a new journal indicator based on citation data from Scopus. A journal’s SNIP can be thought of as similar to a normalised Impact Factor, which weights citations to adjust for the fact that some fields are more citation-rich than others. It is expected that SNIPs will allow for more effective comparison of journals between different fields.
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