[R-meta] rule of thumb miminum number of studies per factor level meta-regression

Viechtbauer, Wolfgang (SP) wo||g@ng@v|echtb@uer @end|ng |rom m@@@tr|chtun|ver@|ty@n|
Tue Mar 29 12:28:05 CEST 2022

And to go along with this:


Also, in case you are dealing with dependent effect sizes, this is also relevant:



>-----Original Message-----
>From: R-sig-meta-analysis [mailto:r-sig-meta-analysis-bounces using r-project.org] On
>Behalf Of Lukasz Stasielowicz
>Sent: Monday, 28 March, 2022 19:26
>To: r-sig-meta-analysis using r-project.org; Lena Pollerhoff
>Subject: Re: [R-meta] rule of thumb miminum number of studies per factor level
>Dear Lena,
>as Wolfgang has pointed out, it's a rather complex topic.
>In general, power is rather low in moderator analyses and depends on
>several factors.
>You'll find a short introduction in the following book (e.g. Chapter 6):
>Pigott, T. (2012). Advances in meta-analysis. Springer Science &
>Business Media. https://doi.org/10.1007/978-1-4614-2278-5
>Since you're working in Germany you can probably access Springer ebooks
>for free.
>Lukasz Stasielowicz
>Osnabrück University
>Institute for Psychology
>Research methods, psychological assessment, and evaluation
>Seminarstraße 20
>49074 Osnabrück (Germany)

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