In its article Internet encyclopaedias go head to head, Nature magazine’s online version compared 50 entries from the websites of Wikipedia and the Encyclopaedia Britannica. They chose subjects that represented a broad range of scientific disciplines. All entries were chosen to be approximately the same length in both encyclopaedias. Each pair of entries was sent to an expert for peer review. The reviewers, who were not told which article was which, were asked to look for three types of inaccuracy: factual errors, critical omissions and misleading statements.
Of eight “serious errors�? the reviewers found – including misinterpretations of important concepts – four came from each source, the journal reported.
A list of the peer-reviewed encyclopedia entries reveals 162 and 123 flaws in Wikipedia and Britannica, respectively.