Questions tagged [publication-bias]

A bias in what academic research is more likely to be published; e.g. findings with significant outcomes are more likely to be published than the rest.

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Publication bias in meta-analysis of single case studies

Is there a way of investigating publications bias in a meta-analysis of single case studies? Usually one can assess publication bias using funnel plots or Egger's test to assess funnel plot asymmetry. ...
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Are there extensions of publication-bias tests for Network Meta-Analysis?

In pairwise meta-analysis, it is common to check for publication bias. In particular, there are multiple tests for funnel-plot asymmetry (see here for Cochrane's recommendations about that: https://...
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Inflation of effect size estimation among significant results?

Correction for multiple testing is often performed on the alpha value. However, multiple testing is, I think, likely to inflate also the estimated effect size of the most significant effects found. ...
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Tests for publication bias using sample size in the absence of variance estimates

Background A colleague of mine is conducting a meta-analysis for which he has available the “raw” mean differences for each study along with the sample sizes. The differences are between-subjects ...
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How to correct for study bias in protein interaction data?

Interactions between proteins are crucial for the correct functioning of the living cell. That is why it is important to study protein interaction networks, detect hubs, leaves and network modules and ...
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Qualitative assessment of (negative) publication bias

I have been doing some literature analysis in a certain surgical implants. In the early 2000´s Implant 1 was introduced. This implant proved to be successful and naturally several medical industries ...
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Z-value in R using the Eggers test. How to get the t-value

I am currently conducting a meta-analysis using R for my masterthesis. To test for publication bias I ran the Eggers test. In the output I get a z-value, however in all the published meta-analysis ...