“…Most of these examine the extent to which scientific articles are visible on various platforms (coverage), the average attention they receive (mean event rate), and the degree to which the metrics correlate with citations and other metrics. In terms of signal, Mendeley (the social bookmarking platform) has been shown to be the dominant source, with levels of coverage as high as 50-70% in some disciplines (e.g., biomedical research and the social sciences) and nearly ubiquitous coverage for some journals (e.g., Nature, Science, JASIST, and PLOS journals) (Haustein et al, 2014b;Bar-Ilan, 2012; in press a; Mohammadi and Thelwall, 2014;Priem et al, 2012). Other social reference managers such as CiteULike and BibSonomy capture less activity (Haustein and Siebenlist, 2011;; for example, 31% of PLOS articles were bookmarked on CiteULike compared to 80% on Mendeley (Priem et al, 2012).…”