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Research Metrics: Measuring the Influence and Impact of Research: Author Influence & Impact

A guide to understanding impact factors, journal rankings, h-index, alt-metrics, and other means of analyzing the influence and impact of published research.


What is the h-Index?

"Index h, [is] defined as the number of papers with citation number higher or equal to h" Hirsch, 2005

Where can I find my h-Index?

Publish or Perish

Harzing's Publish or Perish software uses Google Scholar to obtain citations from a particular author and calculate these statistics:

  • Total number of papers
  • Total number of citations
  • Averages
  • H-Index
  • Various off-shoots of the H-Index such as the G-Index

Other Author Level Research Metrics

i10-index:  the number of publications with at least 10 citations each. Introduced in 2011 by Google Scholar.

Author impact calculations

The h-index and m quotient:

Hirsch, J. E. (2005). An index to quantify an individual's scientific research output . PNAS 102 (46) 16569-16572; 5, doi:10.1073/pnas.0507655102.

A review article of the more recent assessment options:

Zhang, Chun Ting. (2012) The h’-Index, Effectively Improving the h-Index Based on the Citation Distribution. PLoS ONE 8(4): e59912.

Thompson, Dennis F.; Callen, Erin C.; Nahata, Milap C. (2008) New indices in scholarship assessment. American Journal of Pharmaceutical Education 73 (6), Article 111.

The g-index:

Egghe, Leo (2006). Theory and practise of the g-index. Scientometrics 69 (1), 131-152. DOI:10.1007/s11192-006-0144-7.

The A-index

Burrell, Quentin L. (2007). On the h-index, the size of the Hirsch core and Jin's A-index. Journal of Informetrics 1 (2), 170-177. DOI:10.1016/j.joi.2007.01.003.

The Creativity Index

Soler, Jose M. (2007). A rational indicator of scientific creativity. Journal of Informetrics 1 (2), 123-130. DOI:10.1016/j.joi.2006.10.004.

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