<div dir="ltr">Impact assessment is one of the major drivers in scholarly communication, in particular since the number of available faculty positions and grants has far exceeded the number of applications. <b><font color="#ff0000">Peer review still plays a critical role in evaluating science, but citation-based bibliometric indicators are becoming increasingly important</font></b>. This chapter looks at a novel set of indicators that can complement both citation analysis and peer review. Altmetrics use indicators gathered in the real-time Social Web to provide immediate feedback about scholarly works. We describe the most important altmetrics and provide a critical assessment of their value and limitations.<div>
<br><a href="http://book.openingscience.org/vision/altmetrics.html">http://book.openingscience.org/vision/altmetrics.html</a></div></div>