
BIBLIOMETRICS offers a set of methods and measures that can be used to assess research impact and patterns in scholarly communication. In essence, it measures the PRODUCTIVITY and IMPACT of the published work.
Main uses: Ranking and benchmark data, assessment of individual researchers and journal rankings.

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Metric level |
Metric |
Definition |
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Author Level Metrics |
Publication Count per Author |
Total number of publications by an author during a time frame. |
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Citation Count per Author |
Total number of citations an author has received for all their work over a specific timeframe. |
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Field Weighted Citation Impact (FWCI) per Author |
Ratio of citations received by an author relative to the expected world average for the subject field, publication type, and year. |
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h-Index |
The number of papers (h) that have been cited at least h times. |
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Article Level Metrics |
Citation Count per Article |
Number of citations a publication receives during a specific time window. |
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Field Weighted Citation Impact per Article |
Ratio of actual citations to expected citations for an output of similar type, field, and age. FWCI=1 means world average; FWCI>1 indicates above-average citations. |
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Article Ranking in Topic |
Articles sorted by topic and citation count; allows identification of top-performing papers in a specific topic. |
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Journal Level Metrics |
Journal Impact Factor (JIF) |
The average number of citations in a year for all articles and reviews published in a journal over the past three years. |
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JCR (Journal Citation Reports): |
A yearly report that provides journal metrics like Impact Factor and quartiles (Q1–Q4) to help assess journal influence. |
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SNIP (Source Normalized Impact per Paper) |
Measures a journal’s citation impact relative to the citation practices of its field. It adjusts for differences in how often papers are typically cited in different disciplines, so you can compare journals across fields. |
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CiteScore |
Measures the average citations per document for a journal over a set period (usually four years). It reflects the overall citation impact of the journal’s content, not individual papers. |
Altmetrics are measures that capture the attention a resource generates on the social web or other sources. This attention could be positive or negative. They can be applied to journal articles, books/book chapters, software, datasets, websites, videos, etc. Altmetrics attempt to show the influence and engagement of work through blogs, reference management systems, scholarly social networks, and other platforms. They are metrics that complement traditional metrics, such as citation counts, to capture the impact within the scholarly community and beyond.
Measures of impact based on online activity, which are mined or gathered from online tools and social media. For example:

Altmetric providers and tools
This free bookmarklet can be used by individual researchers to see how much attention an article got online.
Several academic databases and platforms incorporate Altmetric badges to display article-level attention data. Notable examples include IEEE Xplore, ProQuest, and platforms like Oxford University Press online books. Additionally, many journal publishers like Elsevier, Nature, Springer, Taylor & Francis, and Wiley include Altmetric data on their platforms.