[R-meta] How to deal with "dependent" Effect sizes?

Angeline Tsui angelinetsui at gmail.com
Mon Feb 26 17:27:27 CET 2018

Hello Mark,

Thanks for sharing your manuscript with me. I will take a look.

But, if anyone knows how to deal with dependent ES using metafor, please
let me know.


On Mon, Feb 26, 2018 at 10:26 AM, Mark White <markhwhiteii at gmail.com> wrote:

> I did a meta-analysis that dealt with a lot of studies with dependent
> variables at the participant level. I got a great deal of help from this
> group (and others), and I settled eventually on robust variance estimation.
> See pages 21 to 23 here (https://github.com/markhwhiteii/prej-beh-meta/
> blob/master/docs/manuscript.pdf) on how I came to that decision and some
> great references for using their robumeta package. I'm sure there is a way
> to do this in metafor, as well.
> On Mon, Feb 26, 2018 at 10:08 AM, Angeline Tsui <angelinetsui at gmail.com>
> wrote:
>> Hello all,
>> I am working on a meta-analysis that may contain dependent effect sizes.
>> For example, there are five studies in a paper. However, study 1, 2 and 3
>> tested the same group of participants whereas study 4 and 5 tested
>> different groups of participants. This means that the effect sizes in
>> study
>> 1, 2 and 3 are dependent of each other, whereas study 4 and 5 are
>> independent of each other. In this case, how should I incorporate these
>> studies in a meta-analysis? Specifically, my concern is that if I put all
>> five studies in a meta-regression, then I am not ensuring that each effect
>> size is independent of each other.
>> Thanks,
>> Angeline
>> --
>> Best Regards,
>> Angeline
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Best Regards,

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