Hi,
1) So I should generate a .mgh file, which will be the input for the mri_surf2surf script, for each comparison I wish to do?
I have three 3 groups (schizophrenia, bipolar disorder and controls), and both schizophrenia and bipolar disorder can be further divided into remission / non-remission subgroups. If I want to compare schizophrenia subgroups to controls, not including bipolar disorder, should I run mris_preproc separately including only schizophrenia subjects and controls?

2) I intent to use de Mass-univariate model from the Linear Mixed Effects (LME) Models Wiki page. I just used the qdec.table to input the subjects list, as suggested in the Wiki. Should I necessarily include -qdec-long (table also with the .base. templates folders) in the mris_preproc or may I use  the -qdec instead (including only .long. processing)?

Thanks a lot!
 
-- 
Pedro Rosa

On Monday, January 27, 2014 at 9:07 PM, Douglas N Greve wrote:


On 01/27/2014 06:03 PM, Pedro Rosa wrote:

Pedro Rosa

Hi,
I have a couple of questions about the mris_preproc:
1) Can I include all subjects in the qdec.table, but afterwards exclude some of them (based on a determined categorial variable) during the statistical analysis?
I don't think so. This was originally part of the plan but we never got
around to implementing it.
I understood that the script assembles thickness / area data into a single file, but individual data is not changed depending of other subjects’ data (it assembles individual data independently of other subjects into common-space fsaverage). Am I mistaken?
No, you are correct

2) In a longitudinal study, should I include the .base. folders in the qdec-long.table (variable 2), or is it the same to include only the .long. folders in the qdec.table (below fsid)?
QDEC is not the right tool for doing longitudinal analysis. Use
mri_glmfit from the command line instead.
doug



Thanks a lot,
Pedro.
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