Re: [Freesurfer] Confidence interval for Cohen's d from gamma/rstd {Disarmed}

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Ok, thanks! I think the gamma CI will do. Caspar

On Mon, Oct 7, 2019 at 17:11 Greve, Douglas N.,Ph.D. DGREVE@mgh.harvard.edu wrote:

You want the 95% CI for Cohen's d itself? I don't know how to do that. If you just want it for the contrast (gamma), then I would just use the formula for a gaussian with mean gamma and stddev sqrt(gammavar)

On 10/5/2019 10:43 AM, Caspar M. Schwiedrzik wrote:

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Hi! I have an OSGM from a fixed effects group analysis with mri_glmfit. I would like to calculate the effect size and the 95% confidence intervals. I see from various threads on the mailing list that Cohen's d can easily be obtained from the outputs of mri_glmfit by dividing gamma by rstd.

I am wondering now how to compute the 95% CIs for Cohen's d from the outputs of mri_glmfit?

Thank you very much! Caspar

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