Altmetrics or alternative metrics measure the attention a resource generates on the social web or other sources. Altmetric.com is a subscription product.
They can be applied to journal articles, books/book chapters, software, datasets, websites, videos, etc.
Altmetrics attempt to show influence and engagement of work through blogs, reference management systems, scholarly social networks, and other platforms.They are metrics that complement traditional metrics such as citation counts to capture the impact within the scholarly community and beyond in the society.
See below for a 3 min YouTube video with closed captions called What are Altmetrics?
Altmetrics can measure different types of attention from many different sources:
You can see some examples of Altmetrics data (where available) on CityLibrary Search
Conduct a search and when you have a list of results, the Altmetrics score will appear to the right hand side of some of the results. Click on this to see more information such as Twitter and Facebook mentions and the number of readers on social networking tools (eg. Mendeley).
Some databases such as ScienceDirect display Altmetric data for articles and publications where available.
As mentioned above, you can install the Altmetric bookmarklet tool on your browser and click on this while reading a journal article to see an Altmetric overview.
Look out for the Altmetric button next to items in City Research Online This will link to data from Altmetric.com and show you how often an article has been mentioned or shared on Twitter, Mendeley etc
Read an article from City Research Online? If you have found it useful and wish to comment on it or to share it with other researchers, you can use the share buttons next to each article.
Here is an example of an article by Thurman and Walters. The Altmetrics button shows it has an Altmetric score of 73. Clicking on the button enables you to see more detail, including who is sharing the article. Looking at the download statistics for this article, we can see that they are quite high, as researchers see the shared tweets and other mentions. So the impact of this article is good, and this extra outreach is likely to result in increased citations in other research such as peer reviewed articles as researchers have been alerted to a useful piece of research.