منابع مشابه
Adjusting for Publication Bias in Meta-Analysis
We review and evaluate selection methods, a prominent class of techniques first proposed by Hedges (1984) that assess and adjust for publication bias in meta-analysis, via an extensive simulation study. Our simulation covers both restrictive settings as well as more realistic settings and proceeds across multiple metrics that assess different aspects of model performance. This evaluation is tim...
متن کاملAdjusting for publication bias in the presence of heterogeneity.
It is known that the existence of publication bias can influence the conclusions of a meta-analysis. Some methods have been developed to deal with publication bias, but issues remain. One particular method called 'trim and fill' is designed to adjust for publication bias. The method, which is intuitively appealing and comprehensible by non-statisticians, is based on a simple and popular graphic...
متن کاملTrim and fill: A simple funnel-plot-based method of testing and adjusting for publication bias in meta-analysis.
We study recently developed nonparametric methods for estimating the number of missing studies that might exist in a meta-analysis and the effect that these studies might have had on its outcome. These are simple rank-based data augmentation techniques, which formalize the use of funnel plots. We show that they provide effective and relatively powerful tests for evaluating the existence of such...
متن کاملEstimating and Adjusting for Publication Bias Using Data Augmentation in Bayesian Meta-Analysis
We introduce a Bayesian approach which estimates and adjusts for selection bias in a set of studies used in a meta-analysis. We use a hierarchical model for study outcome, and propose an additional model component to account for publication bias, which is the possibility that studies of interest are not equally likely to be published and hence observed studies are not a random sample. Estimatio...
متن کاملExercise as a treatment for depression: A meta-analysis adjusting for publication bias.
The effects of exercise on depression have been a source of contentious debate. Meta-analyses have demonstrated a range of effect sizes. Both inclusion criteria and heterogeneity may influence the effect sizes reported. The extent and influence of publication bias is also unknown. Randomized controlled trials (RCTs) were identified from a recent Cochrane review and searches of major electronic ...
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ژورنال
عنوان ژورنال: Trends in Ecology & Evolution
سال: 2001
ISSN: 0169-5347
DOI: 10.1016/s0169-5347(01)02235-2