How quickly do publications get read? The evolution of Mendeley reader counts for new articles

Authors : Nabeil Maflahi, Mike Thelwall

Within science, citation counts are widely used to estimate research impact but publication delays mean that they are not useful for recent research. This gap can be filled by Mendeley reader counts, which are valuable early impact indicators for academic articles because they appear before citations and correlate strongly with them.

Nevertheless, it is not known how Mendeley readership counts accumulate within the year of publication, and so it is unclear how soon they can be used. In response, this paper reports a longitudinal weekly study of the Mendeley readers of articles in six library and information science journals from 2016.

The results suggest that Mendeley readers accrue from when articles are first available online and continue to steadily build. For journals with large publication delays, articles can already have substantial numbers of readers by their publication date.

Thus, Mendeley reader counts may even be useful as early impact indicators for articles before they have been officially published in a journal issue. If field normalised indicators are needed, then these can be generated when journal issues are published using the online first date.

URL : http://hdl.handle.net/2436/620522

 

Are Wikipedia Citations Important Evidence of the Impact of Scholarly Articles and Books?

Authors : Kayvan Koush, Mike Thelwall

Individual academics and research evaluators often need to assess the value of published research. Whilst citation counts are a recognised indicator of scholarly impact, alternative data is needed to provide evidence of other types of impact, including within education and wider society.

Wikipedia is a logical choice for both of these because the role of a general encyclopaedia is to be an understandable repository of facts about a diverse array of topics and hence it may cite research to support its claims.

To test whether Wikipedia could provide new evidence about the impact of scholarly research, this article counted citations to 302,328 articles and 18,735 monographs in English indexed by Scopus in the period 2005 to 2012.

The results show that citations from Wikipedia to articles are too rare for most research evaluation purposes, with only 5% of articles being cited in all fields. In contrast, a third of monographs have at least one citation from Wikipedia, with the most in the arts and humanities.

Hence, Wikipedia citations can provide extra impact evidence for academic monographs. Nevertheless, the results may be relatively easily manipulated and so Wikipedia is not recommended for evaluations affecting stakeholder interests.

URL : http://www.scit.wlv.ac.uk/~cm1993/papers/WikipediaCitations.pdf

arXiv e-prints and the journal of record: An analysis of roles and relationships

Authors : Vincent Larivière, Cassidy R. Sugimoto, Benoit Macaluso, Staša Milojević, Blaise Cronin, Mike Thelwal

Since its creation in 1991, arXiv has become central to the diffusion of research in a number of fields. Combining data from the entirety of arXiv and the Web of Science (WoS), this paper investigates (a) the proportion of papers across all disciplines that are on arXiv and the proportion of arXiv papers that are in the WoS, (b) elapsed time between arXiv submission and journal publication, and (c) the aging characteristics and scientific impact of arXiv e-prints and their published version.

It shows that the proportion of WoS papers found on arXiv varies across the specialties of physics and mathematics, and that only a few specialties make extensive use of the repository.

Elapsed time between arXiv submission and journal publication has shortened but remains longer in mathematics than in physics. In physics, mathematics, as well as in astronomy and astrophysics, arXiv versions are cited more promptly and decay faster than WoS papers.

The arXiv versions of papers – both published and unpublished – have lower citation rates than published papers, although there is almost no difference in the impact of the arXiv versions of both published and unpublished papers. »

URL : http://arxiv.org/abs/1306.3261