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The impact factor relates to a specific time period; it is possible to calculate it for any desired period. For example, the JCR also includes a five-year impact factor, which is calculated by dividing the number of citations to the journal in a given year by the number of articles published in that journal in the previous five years. [14] [15]
Negative consequences of rankings are generally well-documented and relate to the performativity of using journal rankings for performance measurement purposes. [20] [21] Studies of methodological quality and reliability have found that "reliability of published research works in several fields may be decreasing with increasing journal rank", [22] contrary to widespread expectations.
For instance, most papers in Nature (impact factor 38.1, 2016) were only cited 10 or 20 times during the reference year (see figure). Journals with a lower impact (e.g. PLOS ONE, impact factor 3.1) publish many papers that are cited 0 to 5 times but few highly cited articles. [21]
In any given year, the CiteScore of a journal is the number of citations, received in that year and in previous three years, for documents published in the journal during the total period (four years), divided by the total number of published documents (articles, reviews, conference papers, book chapters, and data papers) in the journal during the same four-year period: [3]
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).
Negativity bias is the idea that negative events have a larger impact on one's mental well-being than good ones. [28] Jeffrey Hall, a professor of communication studies at the University of Kansas in Lawrence, notes that due to an individual's regular state of contentment, potential threats provoke one's attention. [29]
The International Initiative for Impact Evaluation (3ie) was set up in response to this report. 3ie seeks to improve the lives of poor people in low- and middle-income countries by providing, and summarizing, evidence of what works, when, why and for how much. 3ie operates a grant program, financing impact studies in low- and middle-income ...
The impact on and of NLP has been extensively studied through citations. Researchers have analyzed various factors such as the cross-field influence between different fields, [42] [43] industry impact, [44] temporal citation patterns, [45] plagiarism, [46] geographic location, [47] and gender. [48]