A survey of publication bias within ecology

Phillip Cassey, JG Ewen, Timothy Blackburn, AP Moeller

Research output: Contribution to journalArticle

34 Citations (Scopus)


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.
Original languageEnglish
Pages (from-to)S451-454
JournalRoyal Society of London. Proceedings B. Biological Sciences
Publication statusPublished - 1 Jan 2004


  • within-study publication bias
  • meta-analysis
  • reporting bias
  • effect size


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