[R-meta] Question about rma(measure = "COR", ..)

[Michael Dewey]

Dear Maria

If you want it to analyse on the transformed scale you need your second 
option ZCOR and then back transform the results. You may want to use the 
function transf.ztor() provided to help you.

I am not sure about your query about trim and fill here but it does seem 
to have become a less popular option recently.

Michael

On 21/10/2019 14:22, Jalynskij, Maria wrote:
> Dear all,
> 
> 
> while conducting a meta-analysis I asked myself a few questions.
> 
> 
> a)When I'm conduction a random effects meta-analysis with correlation-coefficients as effects sizes using
> 
> 
> rma(measure = "COR", ri = corr, ni = n, data = data)
> 
> , does R conduct the analysis with Fisher's-z-transformed coefficients in the background and compute the main-effect results back into the r metric for the output or not?
> 
> 
> b) Or should I use rma(measure="ZCOR", ri = corr, ni = n, data = data), and conduct the main result back by myown at the end?
> 
> 
> In the second version the Trim and Fill method doesn't make any sense.
> 
> 
> I would be glad about some support.
> 
> 
> Sincerely,
> 
> Maria
> 
> 
> 
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> 
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-- 
Michael
http://www.dewey.myzen.co.uk/home.html