Research metrics: Author level metrics
Research metrics are the measures that are used to evaluate the significance or impact of peer-reviewed research work. There are three levels of research metrics: author level, journal level, and article level. The purpose of author-level metrics is to assess the impact and influence of individual authors in the scientific community. In this section, we will go over the various methods for the assessment of author level metrics, which will help you understand how to evaluate an individual author’s productivity and impact.
H index: J.E. Hirsch developed the h-index in 2005, and it is now one of the most widely used author-level metrics for quantifying research productivity by assessing author efficiency and influence. It is determined by counting the number of articles published for which the author has been cited by other authors at least that same number of times. For example, if an author has H index 5 it means the author has 5 publications that have been cited by other authors at least 5 times. The criticism of h index is it does not count the highly cited papers and career span of the author. It is simply based on productivity and impact. Authors with a longer career span have more publications and will have a higher h index score.
How to find h index
For Scopus these are the steps
- Go to Scopus
- After that go to the Authors tab.
Image source: www.scopus.com
- Insert the correct author details and press the search button
- This will take you to the author’s information page. You can view an author’s h-index, generate output graphs and use other tools to calculate the impact and productivity of an author
For Google scholar these are the steps
- Go to the google scholar
- Type the name of author or his/her publication title
- Click the underline author name below the title of work (underline author name means author have google scholar profile)
- This will take you to the author profile page where you can see author total citation, h index and I index.
For Web of science these are the steps
- Go to the web of science
- Enter the author’s name and make sure to search in the “authors” field.
- Choose a research domain and press the Select Organizationbutton.
- Select the organisation and click on Finish Search.
- Simply click the Citation Report link in the upper right-hand corner.
- This will take you to the report page, where you can see the author’s h-index as well as other metrics.
Leo Egghe developed the g-index as an author-level metric in 2006. G index is calculated by the distribution of citations received by a given researcher’s publication. [Given a set of articles] ranked in decreasing order of the number of citations that they received, the G-Index is the (unique) largest number such that the top g articles received (together) at least g2 citations]”(from *Harzig‘s Publish or Perish Manual). For example, if an author has a 10 G index, it indicates that at least 10 of his publications have been cited at least 100 times (g2) . In contrast to the h index, these scores can be produced from a small number of article citations. For example, if a professor has 10 papers, 5 of which have no citations, and the other five have 55,30,10,and 5 would have a g index of 10, but h index of 5 (5 articles have at least 5 citations). The limitation of the G index is that it always favours academicians who have published more papers. It is newer than the h index and not as widely accepted as h index.
Google Scholar created this index, which counts the number of publications with at least 10 citations. It is simple to calculate and easily accessible through Google Scholar profiles. The disadvantage of the I10 index is that it is only accessible through Google Scholar.
How to find I10 index
- Go to Google scholar
- Search for the name of the author or title of his publication
- Click the underlined author name below the title of the work (underline author name means the author has a Google scholar profile).
- This will bring up the author’s profile, and you can check the details of the author.
E Index The e-index, like the h-index, evaluates highly cited scientists and attempts to represent excess citations that the h index ignores. An e-index, on the other hand, is ineffective for researchers with few publications or citations.
M Index It is based on the H-Index and can be calculated by dividing the H-Index by the long time a scientist seems to have been active.
Harzing’s Publish or Perish is software that uses variety of data sources to calculate a few metrics such as total citation, per paper citation, citation on individual author, citation per year, h index, g index, and average number of papers per author.