Self-selected or mandated, open access increases citation impact for higher quality research.
Self-selected or mandated, open access increases citation impact for higher quality research.
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DOI：
10.1371/journal.pone.0013636
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发表时间：
2010-10-18
期刊：
影响因子：
3.7
通讯作者：
Harnad S
中科院分区：
文献类型：
--
作者：
Gargouri Y;Hajjem C;Larivière V;Gingras Y;Carr L;Brody T;Harnad S
作者通过自存档自己的最终草案来补充基于订阅的出版商版本访问的文章，使其在网络上免费访问（“开放获取”，OA）被引用的文章明显多于同一期刊和同一年未被OA的文章。有些人认为，这种“OA优势”可能不是因果关系，而只是一种自我选择的偏见，因为作者更喜欢发表高质量的OA文章。为了验证这一点，我们对2002-2006年在1,984种期刊上发表的27,197篇文章进行了自我选择性自我存档和强制性自我存档的比较。事实证明，OA优势对两者来说都一样高。Logistic回归分析表明，该优势与引用的其他相关因素（文章年龄;期刊影响因子;共同作者，参考文献或页面数量;领域;文章类型;或国家）无关，并且对于最高引用的文章最高。OA优势是真实的、独立的和因果性的，但是倾斜的。它的大小确实与质量相关，就像引用本身一样（前20%的文章获得了所有引用的80%）。可引用文章越多，OA优势就越大，这不是因为作者自己选择要创建OA的内容而产生的质量偏差，而是因为用户自己选择要使用和引用的内容而产生的质量优势，OA使用户摆脱了只有订阅者才能选择访问的限制。希望这些研究结果将有助于激励通过OA自我存档的大学，研究机构和研究资助者的任务。
Articles whose authors have supplemented subscription-based access to the publisher's version by self-archiving their own final draft to make it accessible free for all on the web (“Open Access”, OA) are cited significantly more than articles in the same journal and year that have not been made OA. Some have suggested that this “OA Advantage” may not be causal but just a self-selection bias, because authors preferentially make higher-quality articles OA. To test this we compared self-selective self-archiving with mandatory self-archiving for a sample of 27,197 articles published 2002–2006 in 1,984 journals. The OA Advantage proved just as high for both. Logistic regression analysis showed that the advantage is independent of other correlates of citations (article age; journal impact factor; number of co-authors, references or pages; field; article type; or country) and highest for the most highly cited articles. The OA Advantage is real, independent and causal, but skewed. Its size is indeed correlated with quality, just as citations themselves are (the top 20% of articles receive about 80% of all citations). The OA advantage is greater for the more citable articles, not because of a quality bias from authors self-selecting what to make OA, but because of a quality advantage, from users self-selecting what to use and cite, freed by OA from the constraints of selective accessibility to subscribers only. It is hoped that these findings will help motivate the adoption of OA self-archiving mandates by universities, research institutions and research funders.
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影响因子：
56.9
作者：
Evans, James A.;Reimer, Jacob
通讯作者：
Reimer, Jacob
影响因子：
3.9
作者：
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通讯作者：
Fromerth, Michael J.
DOI：
10.1002/asi.20354
发表时间：
2006-07-01
影响因子：
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作者：
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通讯作者：
Meho, Lokman
影响因子：
105.7
作者：
Davis, Philip M.;Lewenstein, Bruce V.;Simon, Daniel H.;Booth, James G.;Connolly, Mathew J. L.
通讯作者：
Connolly, Mathew J. L.
影响因子：
4.8
作者：
Adler, Nancy J.;Harzing, Anne-Wil
通讯作者：
Harzing, Anne-Wil