Article Level Metrics and Altmetrics
Alternative metrics (often on an article-level) are sometimes called altmetrics. Altmetrics include metrics of use such as views or mentionings in social media. For example, the BMJ published as early as in 2004 the number of views for the articles it published – a metric that is somewhat correlated to subsequent citations. In 2008, the Journal of Medical Internet Research started publishing article-level metrics such as views and tweets ("tweetations") – the latter were found to be predictive for highly cited articles, leading the author to propose the "twimpact factor", which is defined as the number of tweets within the first 7 days of publication, as well as the twindex, which is the rank percentile of the twimpact factor of an article compared to similar articles within the same journal. Starting in March 2009, the Public Library of Science also introduced article level metrics on every article in all of their titles.
Read more about this topic: Impact Factor, Other Measures of Impact
Famous quotes containing the words article and/or level:
“Be assured that it gives much more pain to the mind to be in debt, than to do without any article whatever which we may seem to want.”
—Thomas Jefferson (1743–1826)
“We never exchange more than three words with a Friend in our lives on that level to which our thoughts and feelings almost habitually rise.”
—Henry David Thoreau (1817–1862)