Hi Doug
Thanks for your answer on my issue "glmfit for paired-diff on 2 groups" in the
mailinglist
Commands:
mris_preproc --target 1_average_30VPs --fsgd responder.txt --hemi lh
--meas thickness --out respnon_lh_thickness.mgh —paired-diff-norm
mri_surf2surf --hemi lh --s 1_average_30VPs --fwhm 25 --sval
respnon_lh_thickness.mgh --cortex --tval respnon_lh_thickness.sm25.mgh
mri_glmfit --y respnon_lh_thickness.sm25.mgh --fsgd
responder_paired.txt doss --C sad_groups.txt --surf 1_average_30VPs lh --cortex
--glmdir respnon_lh_thickness
FSGD 1: (responder.txt)
GroupDescriptorFile 1
Title Resonder_NonResponder
Class resp
Class nonresp
Input 1Pre_VP02.long.VP02_Base resp
Input 2Post_VP02.long.VP02_Base resp
Input 1Pre_VP03.long.VP03_Base nonresp
Input 2Post_VP03.long.VP03_Base nonresp
Input 1Pre_VP04.long.VP04_Base resp
Input 2Post_VP04.long.VP04_Base resp
Input 1Pre_VP05.long.VP05_Base nonresp
Input 2Post_VP05.long.VP05_Base nonresp
Input 1Pre_VP06.long.VP06_Base resp
Input 2Post_VP06.long.VP06_Base resp
Input 1Pre_VP07.long.VP07_Base resp
Input 2Post_VP07.long.VP07_Base resp
Input 1Pre_VP08.long.VP08_Base resp
Input 2Post_VP08.long.VP08_Base resp
Input 1Pre_VP09.long.VP09_Base resp
Input 2Post_VP09.long.VP09_Base resp
Input 1Pre_VP10.long.VP10_Base nonresp
Input 2Post_VP10.long.VP10_Base nonresp
.
.
.
FSGD 2: (responder_paired.txt)
GroupDescriptorFile 1
Class resp
Class nonresp
Input VP02pair resp
Input VP03pair nonresp
Input VP04pair resp
Input VP05pair nonresp
Input VP06pair resp
Input VP07pair resp
Input VP08pair resp
Input VP09pair resp
Input VP10pair nonresp
.
.
.
Best,
Vivian
_____________________________________________________________
On 11/04/2013 03:34 PM, Douglas N Greve wrote:
>Yes, that looks correct, though I could be more confident if you send
>the command lines used and your fsgd file(s).
>doug
_____________________________________________________________
On 10/31/2013 07:32 AM, Vivian R. Steiger wrote:
> Dear FS-Experts,
>
> I would like to compare 2 Groups (Responder (N=19) vs. Non-Responder (N=11))
> with longitudinal data.
> Participants from both groups had only 2 scan sessions in each case 10 weeks
> apart.
>
> So far is used the glmfit-variant with --paired-diff option in the first
> place. (based on
http://surfer.nmr.mgh.harvard.edu/fswiki/PairedAnalysis
)
>
> The paired-fsgd contained then 2 classes (Responder, Non-Responder) which is
> used in glm-fit for comparison with the contrast (1 -1) for group diffs.
>
> This approach confirmed our hypothesized effects but I'm not sure whether I
> used the right strategy.
>
> Could you might help me with this issue?
>
> Thank in advance
>
>
> Best,
>
> Vivian
>
>
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