03 SNIP
Created by Professor Henk Moed at CTWS, University of Leiden, Source Normalized Impact per Paper (SNIP) measures contextual citation impact by weighting citations based on the total number of citations in a subject field. The impact of a single citation is given higher value in subject areas where citations are less likely, and vice versa.
SNIP
- Measures contextual citation impact by ‘normalizing’ citation values
- Takes a research field’s citation frequency into account
- Considers immediacy - how quickly a paper is likely to have an impact in a given field
- Accounts for how well the field is covered by the underlying database
- Calculates without use of a journal’s subject classification to avoid delimitation
- Counters any potential for editorial manipulation
Relevant links
- Research Paper: “Measuring contextual citation impact of scientific journals”
- SNIP information website
- CTWS Institute website
