Bibliometrics
Bibliometrics seeks to quantitatively analyze scientific and technological literature in an attempt to determine the scholarly impact of an article or published work. One of the most common methods is citation analysis, whereby a citation is examined primarily for frequency and for patterns of occurrence in other published works. From The University of Pittsburg Libraries
Altmetrics
“Alternative metrics” or “altmetrics” refers to different ways of measuring the use of, and impact of, scholarship scholarly works including many that aren't traditionally captured through citation counts, such as figures and images, reports, data sets, proceedings, and presentations and slides.. Rather than solely measuring the number of times a work is cited in scholarly literature, altmetrics aims to capture a more complete picture of scholarly impact by counting and analyzing the usage of more recent avenues of scholarly communication:
Altmetrics doesn’t seek to replace conventional bibliometrics, but rather, endeavors to generate more timely and complete pictures of scholarly impact that can help researchers to better focus their efforts on avenues that are garnering the most interest, and ultimately, the greatest impact for their work. From The University of Pittsburg Libraries
Learn More...
The number of citations made in the current year to articles in the previous 2 years, divided by the total number of citable articles from the previous 2 years.
The number of citations made in the current year to articles in the previous 3 years of the journal, divided by the total number of articles in the previous 3 years of the journal.
Citations to articles from the most recent five full years, divided by the total number of articles from the most recent five full years. "How much is this journal being cited during the most recent five full years?"
Citations to articles from the current year, divided by the total number of articles from the current year. "How much is this journal being cited during the current year?"
For the current Journal Citation Reports year, the median age of journal articles cited. "What is the duration of citation to articles in this journal?"
Similar to the 5-Year Journal Impact Factor, but weeds out journal self-citations. It also, unlike the Journal Citation Reports impact factor, cuts across both the hard sciences and the social sciences.
Turns the Eigenfactor into a multiplier. A score of 2 is twice as good as a score of 1; a score of 20 is 4 times as good as a score of 5.
The Eigenfactor score divided by the number of articles published in the journal. "I know how impactful the journal as a whole is, but what about the average individual article in the journal?"
This metric doesn't consider all citations of equal weight; the prestige of the citing journal is taken into account.
Also known as RIP (raw impact per publication), the IPP is used to calculate SNIP. IPP is the number of current-year citations to papers from the previous 3 years, divided by the total number of papers in those 3 previous years.
SNIP weights citations based on the number of citations in a field. If there are fewer total citations in a research field, then citations are worth more in that field.
This metric is based on the articles published by a journal over 5 calendar years. h is the largest number of articles that have each been cited h times. A journal with an h5-index of 43 has published, within a 5-year period, 43 articles that each have 43 or more citations.
Definitions. (2020). Scholarly Metrics. https://guides.library.jhu.edu/metrics/journal-metrics.