Table 1

Differences in the contribution to h-index and fractional h-index of an article with 50 citations based on author rankings

Author rank*†Number of citations valid for h-index calculationPercent of citations valid for the fractional h-index calculationNumber of citations valid for fractional h-index calculation
150100%50
25075%37.5
35050%25
45025%12.5
55025%12.5
65025%12.5
75025%12.5
85025%12.5
950100%50

Note(s):*In case of shared rankings (e.g. co-first or co-last authors), the number of citations allocated will be the total sum of the citations for those positions divided equally among the authors sharing the rank. For instance, in this scenario if the first and second authors are designated as co-first authors, each would receive 43.75 citations, calculated as follows: (50 + 37.5)/2

If the corresponding author is not listed among the primary authors (i.e. within the first three positions or as the last author), he will receive 50% of the citation count toward the fractional h-index. If the corresponding authorship is shared, the citation count will be divided accordingly, with each author retaining the higher value between their assigned ranking-based citation count and their corresponding author status

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