Examining the Impact of the National Institutes of Health Public Access Policy on the Citation Rates of Journal Articles
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Authors
De Groote, Sandra L.
Shultz, Mary
Smalheiser, Neil R.
Issue Date
2015
Type
Article
Language
en_US
Keywords
Alternative Title
Abstract
Purpose 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. Methods 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. Results 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). Conclusion 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).
Description
Citation
De Groote, S. L., Shultz, M., & Smalheiser, N. R. (2015). Examining the Impact of the National Institutes of Health Public Access Policy on the Citation Rates of Journal Articles. PLOS ONE, 10(10), e0139951. doi:10.1371/journal.pone.0139951
Publisher
PLoS ONE
License
Attribution 4.0 International
Journal
Volume
Issue
PubMed ID
ISSN
1932-6203