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Metrics and Impact: Overview


Measures of research performance, impact and engagement may be used when applying for grants or academic promotion.

They can be measured by a variety of metrics, including:

  • how many times a publication has been cited
  • an author's category normalised citation impact (CNCI)
  • benchmarking an author's CNCI against category, national or international data
  • the top 1% or 10% most cited researchers in a category
  • the quality of the journal in which an article has been published
  • the amount of international or industry collaboration
  • how many libraries hold a copy of a book, or book sales
  • how much attention has been seen via social media
  • whether research has influenced policy.

Summary table of metrics tools

Clarivate Analytics



Web of Science
Access peer reviewed multidisciplinary research including emerging trends and citation analysis. Available metrics include author H index calculations, journal impact factor, times cited and cited references
Access mutidisciplinary peer reviewed literature including journals, books and conference proceedings. Provides tools to analyse research including by total citations, cited by, CiteScore, author h index, SJR (SCImago Journal Rank) and SNIP (Source Normalized Impact per Paper)
Google Scholar metrics
Ranks documents according to criteria such as whether full text is available, published location, authorship and citation rate.  Available metrics include h5-index and h-5 medium
InCites Journal Citation Reports (JCR)
A resource tool for journal evaluation, JCR shows journal impact factor calculations, and citation rates for selected journals. Allows you to also compare journals within subject categories
SCImago Journal and Country Rank (SJR)
Developed from information contained in the Scopus database, the SJR website allows you to search by individual journal title or subject category and view rankings for each journal. Metrics include journal H index, total documents, references and cites. It is an alternative to JCR
Google Scholar Citations
Google Scholar Citations allows authors to set up a profile page that lists their publications and citation metrics sourced from Google Scholar. The citation metrics are updated automatically, and you can choose to have your list of publications either updated automatically or alternatively you can update these yourself. If you choose to have your publications updated automatically you will need to check your profile for accuracy. You can also make your profile public so that your name appears in the search results when it is searched upon


PlumX Metrics (available via Scopus)
Creates and categorizes metrics on individual research outputs.  PlumX metrics include: usage, mentions, social media and citations. Search for an individual output to view its PlumX metrics