To examine whether National Institutes of Health (NIH) funded articles that were archived in PubMed Central (PMC) after the release of the 2008 NIH Public Access Policy show greater scholarly impact than comparable articles not archived in PMC.
A list of journals across several subject areas was developed from which to collect article citation data. Citation information and cited reference counts of the articles published in 2006 and 2009 from 122 journals were obtained from the Scopus database. The articles were separated into categories of NIH funded, non-NIH funded and whether they were deposited in PubMed Central. An analysis of citation data across a five-year timespan was performed on this set of articles.
A total of 45,716 articles were examined, including 7,960 with NIH-funding. An analysis of the number of times these articles were cited found that NIH-funded 2006 articles in PMC were not cited significantly more than NIH-funded non-PMC articles. However, 2009 NIH funded articles in PMC were cited 26% more than 2009 NIH funded articles not in PMC, 5 years after publication. This result is highly significant even after controlling for journal (as a proxy of article quality and topic).
Our analysis suggests that factors occurring between 2006 and 2009 produced a subsequent boost in scholarly impact of PubMed Central. The 2008 Public Access Policy is likely to be one such factor, but others may have contributed as well (e.g., growing size and visibility of PMC, increasing availability of full-text linkouts from PubMed, and indexing of PMC articles by Google Scholar).
URL : Examining the Impact of the National Institutes of Health Public Access Policy on the Citation Rates of Journal Articles
DOI : 10.1371/journal.pone.0139951
We present here evidence for the existence of a citation advantage within astrophysics for papers that link to data. Using simple measures based on publication data from NASA Astrophysics Data System we find a citation advantage for papers with links to data receiving on the average significantly more citations per paper than papers without links to data. Furthermore, using INSPEC and Web of Science databases we investigate whether either papers of an experimental or theoretical nature display different citation behavior.
URL : http://arxiv.org/abs/1511.02512
This paper reports on an interview-based citation behaviour study, part of a wider study of trust in information resources, investigating why researchers chose to cite particular references in one of their publications. Their motivations are explored, with an emphasis on whether they regarded the reference as an authoritative and trustworthy source, and, if so, to what extent and why.
Semi-structured critical incident interviews were carried out with eighty-seven researchers from the UK and the USA.
The answers were analysed using qualitative techniques and then grouped under descriptive headings of the types of reasons for citation provided. These were then used to create a table of these types of reason and the frequency of their use.
The motivations for citing were found to be complex and multi-faceted but, in nearly all cases, researchers do regard the authority and trustworthiness of the cited source as an important factor in choosing to cite it. This suggests that citation is at least partly an acknowledgement of the intellectual influence of the content of the cited source. It was also found, however, that researchers have strong social networks of trust and collaboration. They make considerable use of these in receiving and gathering information for research and thus context is also important in their eventual citation decisions.
Citing behaviour does include an acknowledgement of useful intellectual content, but this process cannot be separated from the researcher’s position in networks of trusted social and research influence. The digital transition has provided tools to help maintain and develop these social networks and it has also made it easier for researchers to investigate the credentials of the sources of documents. This suggests that the current distinction in the literature between normative and constructionist theories of citation behaviour may not capture the nuanced and complex relationship between these two factors.
URL : http://www.informationr.net/ir/20-3/paper677.html
« The aim of this research was to identify the motivations for citation to Wikipedia in scientific papers. Also, the number of citation to Wikipedia, location of citation, type of citing papers, subject of citing and cited articles were determined and compared in different subject fields. From all English articles indexed in Scopus in 2007 and 2012 that have cited Wikipedia, 602 articles were selected using stratified random sampling. Content analysis and bibliometric methods were used to carry out the research. Results showed that there are 20 motivations for citing Wikipedia and the most frequent of them are providing general information and definition, facts and figures. Citations to Wikipedia often were in the introduction and introductory sections of papers. Computer sciences, internet and chemistry were the most cited subjects. The use of Wikipedia in articles is increasing both in terms of quantity and diversity. However, there are disciplinary differences both in the amount and the nature of use of Wikipedia. »
URL : http://www.jscires.org/text.asp?2013/2/3/231/135415
An open-access journal allows free online access to its articles, obtaining revenue from fees charged to submitting authors. Using panel data on science journals, we are able to circumvent some problems plaguing previous studies of the impact of open access on citations.
We find that moving from paid to open access increases cites by 8% on average in our sample, but the effect varies across the quality of content. Open access increases cites to the best content (top-ranked journals or articles in upper quintiles of citations within a volume) but reduces cites to lower-quality content.
We construct a model to explain these findings in which being placed on a broad open-access platform can increase the competition among articles for readers’ attention. We can find structural parameters allowing the model to fit the quintile results quite closely.
URL : http://ssrn.com/abstract=2269040
Collaboration scientifique et citations des articles : Quelles pratiques dans les revues médicales ? :
« Objectifs : La meilleure façon de caractériser la collaboration scientifique est d’étudier la co-signature des articles. Deux indicateurs sont intéressants : le nombre d’auteurs et son caractère international. L’objectif est d’étudier la corrélation entre ces deux indicateurs et le nombre de citations.
Méthodes : Nous avons sélectionné deux journaux de pharmacie et médecine afin de comparer les pratiques. Nous avons utilisé un échantillon d’environ 800 articles publiés entre 2002 et 2005 dont nous avons collecté les citations jusqu’en 2010. Nous avons transformé nos variables numériques, nombre d’auteurs et nombre de citations, en variables qualitatives.
Résultats : Les variables «auteurs» et «citations» ne sont pas indépendantes.
Conclusions. Les articles les moins cités sont souvent publiés par un seul auteur ou par une équipe très réduite alors que le caractère international des articles est un facteur qui en général augmente le nombre de citations. Cette micro-analyse a permis également de mieux appréhender certaines pratiques éditoriales. »
URL : http://hal.archives-ouvertes.fr/hal-00775307
Traditionally, scholarly impact and visibility have been measured by counting publications and citations in the scholarly literature. However, increasingly scholars are also visible on the Web, establishing presences in a growing variety of social ecosystems.
But how wide and established is this presence, and how do measures of social Web impact relate to their more traditional counterparts? To answer this, we sampled 57 presenters from the 2010 Leiden STI Conference, gathering publication and citations counts as well as data from the presenters’ Web “footprints.”
We found Web presence widespread and diverse: 84% of scholars had homepages, 70% were on LinkedIn, 23% had public Google Scholar profiles, and 16% were on Twitter. For sampled scholars’ publications, social reference manager bookmarks were compared to Scopus and Web of Science citations; we found that Mendeley covers more than 80% of sampled articles, and that Mendeley bookmarks are significantly correlated (r=.45) to Scopus citation counts. »
URL : http://2012.sticonference.org/Proceedings/vol1/Bar-Ilan_Beyond_98.pdf