Composite index (metrics)
Measure of scientific research impact
From Wikipedia, the free encyclopedia
The composite index or composite indicator (abbreviated as c-score)[1][2] is a numerical indicator that evaluates the quality of a scientist's research publications, regardless of the scientific field in which they operates.[3][4][5]
It was initially introduced in 2016, by the Greek-American metascience researcher John Ioannidis at Stanford University,[6] with an improvement following in 2019.[7]
The c-score is calculated by an algorithm that combines all scientific research fields and ranks research from the Scopus database across all research areas, even from those with lower citation density.[8] This has allowed researchers to identify the top 2% of the world's most influential scientists, in a unified way across every scientific discipline.[9][10]
The parameters that determine a researcher's c-score are:
- the total number of citations received,
- the Hirsch index for the citations received,
- the Schreiber co-authorship adjusted Hm index for the citations received.
- the total number of citations received to papers for which the scientist is single author,
- the total number of citations received to papers for which the scientist is single or first author, and
- the total number of citations received to papers for which the scientist is single, first, or last author.