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The study also determined that completeness of these Wikipedia articles was lowest (68%) in the category "pharmacokinetics" and highest (91.3%) in the category "indication". The authors concluded that "Wikipedia is an accurate and comprehensive source of drug-related information for undergraduate medical education". [71]
However, recent rigorous study and research have indicated that Wikipedia is as accurate and reliable as many of the peer reviewed works by top publishing companies; Wikipedia’s policies prevent excess vandalism and allow its information more neutral than many other sources; and online reputation of the editors, along with intrinsic values ...
A 2012 study covering 32 language editions analysed circadian activity of editors and concluded that the shares of contributions to English Wikipedia, from North America and Europe-Far East-Australia are almost equal, whereas this increases to 75% of European-Far Eastern-Australian contributions for the Simple English Wikipedia. The research ...
However, although Wikipedia articles are tertiary sources, Wikipedia employs no systematic mechanism for fact-checking or accuracy. Thus, Wikipedia articles (and Wikipedia mirrors) in themselves are not reliable sources for any purpose (except as sources on themselves per WP:SELFSOURCE). Primary sources are often difficult to use appropriately.
Wikipedia: Accuracy and completeness of drug information in Wikipedia medication monographs: 2016-11-17 reliability of Wikipedia Wikipedia health information on Wikipedia: Seeking health information online: does Wikipedia matter? 2009 Wikipedia health information on Wikipedia: A comparative study of academic and Wikipedia ranking: 2013 ...
So Wikipedia:Verifiability is a major help towards the accuracy goal, but does not alone guarantee it. Re-wording with attribution is a way to convert an inaccurate or subjective statement to an accurate one. For example: "The US never landed on the moon" is inaccurate, "John Smith said that the US never landed on the moon." could be accurate.
Overall, Wikipedia's accuracy rate was 80 percent compared with 95-96 percent accuracy within the other sources. This study does support the claim that Wikipedia is less reliable than other reference resources. Furthermore, the research found at least five unattributed direct quotations and verbatim text from other sources with no citations ...
The study found that "Wikipedia comes close to Britannica in terms of the accuracy of its science entries." Nature asked expert reviewers from varied disciplines to review 50 articles in each encyclopedia and evaluate them based solely on accuracy. Articles chosen for comparison involved identical subject matter and were of similar length.