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Published on: January 19, 2018
A survey of publication bias within evolutionary ecology
Phillip Cassey1, John G Ewen, Tim M Blackburn
1School of Biosciences, University of Birmingham, Edgbaston, Birmingham B15 2TT, UK. cassey@wotan.ens.fr
Abstract:
Publication bias has been recognized as a problem in ecology and evolution that can undermine reviews of research results. Unfortunately, direct tests of publication bias are extremely rare. Here, we quantify a well-discussed but, to our knowledge, previously untested form of publication bias: the publication of results with and without estimates of effect size. We find that results published without effect sizes are a biased sample of those that are published. This further complicates the already difficult task of compiling quantitative literature reviews and meta-analytic studies.
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