Composite index (metrics)

This article is about the index of scientific research impact. For other uses, see Composite index (disambiguation).

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.

References

  1. ^ van der Aalst, Wil M. P.; Hinz, Oliver; Weinhardt, Christof (2023). "Ranking the Ranker: How to Evaluate Institutions, Researchers, Journals, and Conferences?". Business & Information Systems Engineering. 65 (6): 615–621. doi:10.1007/s12599-023-00836-5. hdl:10419/310977. ISSN 2363-7005. "An interesting approach to address some of these concerns was proposed by John Ioannidis and his colleagues (Ioannidis 2022; Ioannidis et al. 2016, 2019, 2020). They propose to use a composite indicator (called C-score), which is the sum of the standardized six log-transformed citation indicators (NC, H, Hm, NS, NSF, NSFL)"
  2. ^ Rull, Valenti (24 January 2024), Goodbye H-index, Welcome C-score, MDPI AG, doi:10.20944/preprints202401.1453.v3
  3. ^ Ioannidis, John P.A.; Klavans, Richard; Boyack, Kevin W. (1 July 2016). "Multiple Citation Indicators and Their Composite across Scientific Disciplines". PLOS Biology. 14 (7) e1002501. Public Library of Science (PLoS). doi:10.1371/journal.pbio.1002501. ISSN 1545-7885. PMC 4930269. PMID 27367269.
  4. ^ OLIVEIRA, LETICIA DE; REICHERT, FERNANDA; ZANDONÀ, EUGENIA; SOLETTI, ROSSANA C.; STANISCUASKI, FERNANDA (2021). "The 100,000 most influential scientists rank: the underrepresentation of Brazilian women in academia". Anais da Academia Brasileira de Ciências. 93 (suppl 3). FapUNIFESP (SciELO). doi:10.1590/0001-3765202120201952. hdl:10183/233727. ISSN 1678-2690.
  5. ^ Koltun, Vladlen; Hafner, David (2021-06-28). "The h-index is no longer an effective correlate of scientific reputation". PLOS ONE. 16 (6) e0253397. doi:10.1371/journal.pone.0253397. ISSN 1932-6203. PMC 8238192. PMID 34181681.
  6. ^ Ioannidis, John P.A.; Klavans, Richard; Boyack, Kevin W. (2016-07-01). "Multiple Citation Indicators and Their Composite across Scientific Disciplines". PLOS Biology. 14 (7) e1002501. doi:10.1371/journal.pbio.1002501. ISSN 1545-7885. PMC 4930269. PMID 27367269.
  7. ^ Ioannidis, John P. A.; Boyack, Kevin W.; Baas, Jeroen (2020-10-16). "Updated science-wide author databases of standardized citation indicators". PLOS Biology. 18 (10) e3000918. doi:10.1371/journal.pbio.3000918. ISSN 1545-7885. PMC 7567353. PMID 33064726.
  8. ^ "Career Data 2019". Retrieved 14 April 2024. data until 2019 (career data)
  9. ^ "Top 2% of Scientists on Stanford List". Research and Innovation. 7 April 2021. Retrieved 14 April 2024. "A recently published list of the world's top researchers has reinforced UNT's reputation as a world-class Tier One research university."
  10. ^ "HTI Professors Listed as World's Top 2% Most-cited Scientists by Stanford University". Department of Health Technology and Informatics (in Chinese). Hong Kong Polytechnic University. 6 March 2024. Retrieved 14 April 2024.
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