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Why So Many Insignificant Results in a Meta-analysis?

[From the blog “Where Do Non-Significant Results in Meta-Analysis Come From?” by Ulrich Schimmack, posted at Replicability-Index] “It is well known that focal hypothesis tests in psychology journals nearly always reject the null-hypothesis … However, meta-analyses often contain a fairly…

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Using Z-Curve to Estimate Mean Power for Studies Published in Psychology Journals

[From the blog “Estimating the Replicability of Psychological Science” by Ulrich Schimmack, posted at Replicability-Index] “Over the past years, I have been working on an … approach to estimate the replicability of psychological science. This approach starts with the simple…

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