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Youden's J statistic (also called Youden's index) is a single statistic that captures the performance of a dichotomous diagnostic test. In meteorology , this statistic is referred to as Peirce Skill Score (PSS) , Hanssen–Kuipers Discriminant (HKD) , or True Skill Statistic (TSS) [ 1 ] .
Author-level metrics are citation metrics that measure the bibliometric impact of individual authors, researchers, academics, and scholars. Many metrics have been developed that take into account varying numbers of factors (from only considering the total number of citations, to looking at their distribution across papers or journals using statistical or graph-theoretic principles).
A journal's SJR indicator is a numeric value representing the average number of weighted citations received during a selected year per document published in that journal during the previous three years, as indexed by Scopus. Higher SJR indicator values are meant to indicate greater journal prestige.
The impact factor (IF) or journal impact factor (JIF) of an academic journal is a scientometric index calculated by Clarivate that reflects the yearly mean number of citations of articles published in the last two years in a given journal, as indexed by Clarivate's Web of Science.
The h-index is defined as the maximum value of h such that the given author/journal has published at least h papers that have each been cited at least h times. [4] [7] h-index from a plot of numbers of citations for an author's numbered papers (arranged in decreasing order) The h-index is the largest h such that h articles have at least h ...
The Jaccard index is a statistic used for gauging the similarity and diversity of sample sets. It is defined in general taking the ratio of two sizes (areas or volumes), the intersection size divided by the union size, also called intersection over union ( IoU ).
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[17] [18] [19] In a Journal of the American Society for Information Science and Technology article, Howard D. White et al. wrote: "Bibliometric measures for evaluating research units in the book-oriented humanities and social sciences are underdeveloped relative to those available for journal-oriented science and technology".