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Research Metrics

This guide will help you understand research metrics about authors, articles/books, and journals.

H-index

H-indexes are calculated for journals as well as authors. The calculation is based on citation rates which means this metric indicates impact. The value h is the largest number where at least h articles in that publication were cited at least h times each. 

For example, a journal with 10 articles cited 51, 17, 11, 9, 8, 4, 2, 1, 0 and 0 times has an h-index of 5. There are 5 articles in this publication that have been cited 5 or more times. 

Google Scholar calculates the h5-index, which considers only publications and citations from the last 5 years. The h5-index provides the advantage of currency compared to overall h-index. Google Scholar also provides the h5-median, which takes the median of the h-core, or the articles with more citations than the h-index. In the example above, the h-core is 8, 9, 11, 17, and 51. The median would be 11. 

Scimago Journal & Country Rank also publishes h-indexes for journals, based on Scopus citation data.

h5 Metrics in Google Scholar

1. Open Google Scholar.

2. Select Metrics from the hamburger menu at the top left.

3. Browse by category and subcategory or search for a specific publication.

4. Find the h5-index and h5-median metrics for your journal. 

H-index in Scimago

1. Open Scimago Journal & Country Rank.

2. Search for the journal title and open the record.

3. H-index is displayed prominently on the right.