[R-meta] Confidence intervals for effect sizes in pretest posttest control group designs
Célia Sofia Moreira
ce||@@o||@more|r@ @end|ng |rom gm@||@com
Mon May 13 22:52:59 CEST 2019
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.
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)
> -----Original Message-----
> From: R-sig-meta-analysis [mailto:
> r-sig-meta-analysis-bounces using r-project.org] On Behalf Of Célia Sofia
> 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:
> Can you please tell me how to do this?
> Kind regards,
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