An author's impact on their field or discipline has traditionally been measured using the number of times their academic publications are cited by other researchers. There are numerous algorithms that account for such things as the recency of the publication, or poorly or highly cited papers. While citation metrics may reflect the impact of research in a field, there are many potential biases with these measurements and they should be used with care. For a critique of author impact factors, see this article in the Chronicle of Higher Education.
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Journal h-index is one measure of the quality of a journal and can be calculated using data from Web of Science, Scopus or Google Scholar. As with the impact factor, journal h-index does not take into account differing citation practices of fields (unlike the weighted SJR and SNIP) and so is best used to compare journals within a field.
"An entity has an h-index value of y if the entity has y publications that have all been cited at least y times."
(Hodge & Lacasse 2011, p. 583)
At Texas Tech, there are also guides on the following:
Publications No. of citations Publication 1 15 |