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Altmetrics (or Article-Level Metrics) measure how works are being shared, used, and discussed through social media and publisher sites. Altmetrics can complements established article-level metric tools with emerging data sources such as blog posts, tweets, bookmarking and reference managers.
Commercial service, some free metrics. A free bookmarklet provides Altmetric Attention Score for articles viewed in a browser. Gives data on News outlets, blogs,Twitter, Facebook, Mendeley, Pinterest, Reddit, Google+.
A pay-for-service ($60 a year) open-source, web-based tool that tracks activity on social media and other sites such as Facebook, PLoS, Twitter, YouTube, Slideshare, GitHub, FigShare, Mendeley, delicious, and others. Accepts articles identified by PMID or DOI, as well as other identifiers including URL, and accession numbers to call open Web APIs to gather data. Created by Jason Priem and Neather Piwowar. Funded by the National Science Foundation and the Alfred P. Sloan Foundation
Offers Altmetric for Scopus, a third party application that runs within the sidebar of Scopus pages to track mentions of papers across social media sites and reference managers such as Mendeley. * Altmetric Score: measures quality and quantity of attention that an article has received. The colors surrounding the number reflect the mix of sources where the article has been mentioned. * Number of mentions on social media (Twitter, Facebook, Pinterest, Google+, etc.) and mainstream media (The New York Times, The Guardian, etc.) * Number of users who have included the article citation in their Mendeley or CiteULike libraries