Replication is held as the gold standard for ensuring the reliability of published scientific
literature. But conducting direct replications is expensive, time-consuming, and unrewarded …

Meta-analysis involves cumulating effects across studies in order to qualitatively summarize
existing literatures. A recent finding suggests that the effect sizes reported in meta-analyses …

Publication bias and questionable research practices in primary research can lead to badly
overestimated effects in meta-analysis. Methodologists have proposed a variety of statistical …

Psychology journals rarely publish nonsignificant results. At the same time, it is often very
unlikely (or “too good to be true”) that a set of studies yields exclusively significant results …

Publication bias threatens the validity of meta-analytic results and leads to overestimation of
the effect size in traditional meta-analysis. This particularly applies to meta-analyses that …

This article introduces a new approach for evaluating replication results. It combines effect-
size estimation with hypothesis testing, assessing the extent to which the replication results …

To determine the reproducibility of psychological meta-analyses, we investigated whether
we could reproduce 500 primary study effect sizes drawn from 33 published meta-analyses …

Publication Bias against Null Results Page 1 Psychological Reports, 1997,80,337-338. O
Psychological Reports 1997 PUBLICATION BIAS AGAINST NULL RESULTS ' RAYMOND …

Calculations of the power of statistical tests are important in planning research studies
(including meta-analyses) and in interpreting situations in which a result has not proven to …

Confidence intervals (CIs) and standard error bars give information about replication, but do
researchers have an accurate appreciation of that information? Authors of journal articles in …