[R-meta] Confidence intervals for effect sizes in pretest posttest control group designs

[Célia Sofia Moreira]

Dear Professor Wolfgang Viechtbauer,

Thank you so much for your great support!
I was expecting the answer to be something complicated because I took a
look at your paper (but I didn't have the time to examine it):
Viechtbauer, W. (2007). Approximate confidence intervals for standardized
effect sizes in the two-independent and two-dependent samples design. *Journal
of Educational and Behavioral Statistics, 32*(1), 39–60.

I admire that even when you answer this too basic questions (too basic for
you), you answer in an elegant way.
Science needs people like you! Thanks.

Kind regards,
csm

Viechtbauer, Wolfgang (SP) <wolfgang.viechtbauer using maastrichtuniversity.nl>
escreveu no dia segunda, 13/05/2019 à(s) 09:49:

> Hi Célia,
>
> An approximate 95% CI can be obtained with:
>
> dat$yi + c(-1,1) * qnorm(.975) * sqrt(dat$vi)
>
> Best,
> Wolfgang
>
> -----Original Message-----
> From: R-sig-meta-analysis [mailto:
> r-sig-meta-analysis-bounces using r-project.org] On Behalf Of Célia Sofia
> Moreira
> Sent: Sunday, 12 May, 2019 23:18
> To: r-sig-meta-analysis using r-project.org
> Subject: [R-meta] Confidence intervals for effect sizes in pretest
> posttest control group designs
>
> Dear all,
>
> I would like to compute 95% confidence intervals for the effect sizes in a
> pretest posttest control group design, such as the "Morris example"
> presented in:
> http://www.metafor-project.org/doku.php/analyses:morris2008
>
> Can you please tell me how to do this?
>
> Kind regards,
> CSM
>

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