Hi Ishtiaq,
The dr_stage2_ic* images contain PEs for each subject for one IC, and
the dr_stage2_subject* images contain PEs for each IC for one subject.
If you want COPEs and VARCOPEs, you will need to modify the
dual_regression script - you can use the --out_varcb and --out_cope
options with the second call to fsl_glm.
Cheers,
Paul
On 11/11/2018, Ishtiaq Mawla <[log in to unmask]> wrote:
> Hi FSL experts,
>
> I have outputs from dual regression from a paired sample analysis and would
> now like to look at change in parameter estimate (for each pair) with
> change in a behavioral covariate. In FEAT outputs, I would usually add the
> subtract the COPE images for each pair, and add the VARCOPE images of the
> pair and feed a list of the subtracted COPE images into higher-level FEAT
> along with my behavioral covariate. For dual regression, I believe
> dr_stage2_* is the parameter estimates (COPE) image of each IC for subject
> but I was wondering how I can obtain the associate variance estimate (i.e.
> VARCOPE) images? I would like to subtract the pair of dr_stage2 parameter
> estimate images for a particular IC for a particular subject and then
> perform a regression with behavioral covariate of interest.
>
> Any help would be appreciated, thank you!
>
> Ishtiaq
>
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