Research Impact Metrics

What are h-index and i10-index

H-index & i10-index



  • The h-index is short for the Hirsch index – Jorge E. Hirsch (2005).
  • It’s a metric at the author level that tries to measure both the productivity and citation impact of a scientist’s or scholar’s publications.
Calculating and Metric
  • The h-index is simply a count of the largest number of papers (h) from a journal or author that have at least (h) number of citations.
  • It arranges a researcher’s published articles from highest to lowest citation count.
  • It marks the point where citations equal or exceed the paper’s rank
  •  Although the h-index varies per discipline, it allows  comparison within comparable fields.
Increasing Your h-index
  •  To increase the h-index, one must publish papers of high quality.
  • The researcher should ensure that he/she has not published any article in predatory/fake journals.
  • Researchers should make sure they have not published any articles in predatory or fake journals.
  • However, publishing more review articles may result in more citations, ultimately increasing a profile’s h-index.
Evaluating Academic Careers
  • The h-index is used for assessing academic careers, particularly hiring and promotion decisions, and to compare scholars in the same field.
  • Academic institutions and funding bodies use it to assess scholars for promotions, tenure, and grants.
Example for Calculation
  •  For example, an h-index of 17 means the scientist has published at least 17 papers, each cited at least 17 times.
  • The scientist’s h-index remains 17 if their 18th most cited paper has only 10 citations.
  • However, if the 18th most cited paper was cited 18 or more times, the h-index would increase to 18.


Introduction to the i10-index

  •  Google Scholar introduced the i10-index in 2011
Simple and Straightforward Indexing
  • It’s a basic index. Just count how many papers in a journal have 10 citations or more.
  • The 10-citation benchmark is easy to grasp and sets a clear standard for what qualifies as a well-cited paper.
Complementing Other Metrics
  • It works well with other measures like the h-index, giving more details about a researcher’s productivity and influence.
  • The i10 index also boosts the value of any student’s profile.
Calculation and Accessibility
  • The main advantage of the i10 index is that it can be calculated very easily.
  • Google Scholar provides easy and free access to these metrics.
Indication of Quality Work
  • A higher i10-index means consistently producing great work, which is crucial for success.
  • Connecting with Google Scholar makes it easier to access and use for academic and research assessments.
Example of i10-index Calculation
  • An i-10 index of 25 indicates that for every 25 articles published, the researcher has received at least 10 citations.
  • This index varies among researchers, mainly based on their research subject and sub-sections.

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