KDnuggets : News : 2005 : n17 : item32 < PREVIOUS | NEXT >


Most scientific papers are probably wrong, says John Ioannidis

30 August 2005

NewScientist.com, Kurt Kleiner

Most published scientific research papers are wrong, according to a new analysis. Assuming that the new paper is itself correct, problems with experimental and statistical methods mean that there is less than a 50% chance that the results of any randomly chosen scientific paper are true.

John Ioannidis, an epidemiologist at the University of Ioannina School of Medicine in Greece, says that small sample sizes, poor study design, researcher bias, and selective reporting and other problems combine to make most research findings false. But even large, well-designed studies are not always right, meaning that scientists and the public have to be wary of reported findings.

Here is the rest of the story in New Scientist and a link to
Why Most Published Research Findings Are False, by John P. A. Ioannidis in PLoS Medicine.

KDnuggets : News : 2005 : n17 : item32 < PREVIOUS | NEXT >

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