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

[Lena Pollerhoff]

Dear Wolfgang and Lukasz,

Thank you both for the information! I will go trough these sources!

Best
Lena 
> Am 29.03.2022 um 12:28 schrieb Viechtbauer, Wolfgang (SP) <wolfgang.viechtbauer using maastrichtuniversity.nl>:
> 
> And to go along with this:
> 
> https://cran.r-project.org/package=metapower
> 
> Also, in case you are dealing with dependent effect sizes, this is also relevant:
> 
> https://www.jepusto.com/publication/power-approximations-for-dependent-effects/
> 
> Best,
> Wolfgang
> 
>> -----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
>> meta-regression
>> 
>> 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.
>> 
>> Best,
>> Lukasz
>> --
>> Lukasz Stasielowicz
>> Osnabrück University
>> Institute for Psychology
>> Research methods, psychological assessment, and evaluation
>> Seminarstraße 20
>> 49074 Osnabrück (Germany)