Single parameter indices and bibliometric outliers
- 398 Downloads
In this paper, we look at the issue of the high-end of research performance which is captured in the tail of a citation distribution. As the mean is insufficient to capture the skewness of such distributions, a consistency or concentration measure is the additional parameter needed. We show that the h-index is only approximately a heuristic mock of a composite indicator built from three primary indicators which are the number, mean and consistency term. The z-index is able to sense the change in consistency in the distribution due to the outliers in the tail of the distribution.
KeywordsScientometric distributions Extreme values Mean Quantity Consistency Citation h-Index z-Index
- Garfield, E. (1999). Journal impact factor: A brief review. Canadian Medical Association Journal, 161(8), 979–980.Google Scholar
- Garfield, E. (2005). The agony and the ecstasy: The history and meaning of the journal impact factor. In International Congress on Peer Review and Biomedical Publication. Retrieved Oct 15, 2013 from http://garfield.library.upenn.edu/papers/jifchicago2005.pdf.
- Glänzel, W. (2013b). The application of citation-based performance classes in disciplinary and multidisciplinary assessment. In J. Gorraiz, E. Schiebel, Ch. Gumpenberger, M. Hörlesberger, & H. F. Moed (Eds.), Proceedings of ISSI 2013—The 14th International Conference on Scientometrics and Informetrics, Vienna, Austria (Vol. I, pp. 109–122).Google Scholar
- Glänzel, W., Thijs, B., Debackere, K. (2013). The application of citation-based performance classes in institutional research assessment. In S. Hinze, A. Lottmann (Eds.), Translational Twists and Turns: Science as a Socio-Economic Endeavour, Proceedings of STI 2013 Berlin (18th International Conference on Science and Technology Indicators) (pp. 122–129).Google Scholar
- Hirsch, J.E. (2005). An index to quantify an individual’s scientific research output. In Proceedings of the National Academy of Sciences of the United States of America (Vol. 102, no. 46, pp. 16569–16572).Google Scholar