Re: [Freesurfer] Cluster thresholding

2007-12-21 Thread Alexander Fornito
gt;>>>>> Clusters will then be determined significant if p<05, as >>>>>>> evaluated against the permutation distribution for the maximal >>>>>>> cluster size statistic. >>>>>> You can choose any cluster-wise sig threshold

Re: [Freesurfer] Cluster thresholding

2007-12-05 Thread Alexander Fornito
yeah, I've replaced the input with the sig.mgh for the contrast of interest, which retruns something more plausible. Thanks again, and sorry for the confusion. Ta, Alex > I noticed that you are using contrasts.sig.mgh as the input to > mri_surfcluster and that the source frame is 0. contrasts.si

Re: [Freesurfer] Cluster thresholding

2007-12-05 Thread Alexander Fornito
Sorry, can I ask why the clustering step would invalidate FDR? >From my understanding, FDR allows you set a limit on the number of false positive in a family of contrasts reaching significance at a nominal threshold. I would like to this nominal threshold using cluster stats (e.g., p<.05, cluster

Re: [Freesurfer] Cluster thresholding

2007-12-03 Thread Alexander Fornito
Hi all, I was hoping someone could help me with the problem below. I'm a little stuck on my analysis. Thanks, Alex > On 11/28/2007 07:43 PM, Alex Fornito wrote: >> Hi, >> I have run qdec for a simple contrast comparing thickness across the >> cortical surface between a patient and control group.

[Freesurfer] Qdec covariates

2007-10-29 Thread Alexander Fornito
Hi all, If i run a model in qdec that inludes 1 discrete and 1 continuous factor, does the output for the group contrast covary for the continuous variable? For example, if I want to compare two groups, and include group as my discrete factor and age as a continuous factor, will the output for the

Re: [Freesurfer] Make_average_subject

2007-10-25 Thread Alexander Fornito
, > > It looks like the subject 'testavg' already exists. To overwrite it, > add --force to the make_average_subject, or choose a different name for > the --out arg (or delete the 'testavg' subject). > > Nick > > > On Fri, 2007-10-26 at 11:03 +1000,

[Freesurfer] Make_average_subject

2007-10-25 Thread Alexander Fornito
Hi all, I've been having problems with make_average_subject. The command and error are below. Below this is the same command with the output generated by the --debug flag. I am running version 4.0 (redhat) on Linux Debian. I'd appreciate any help on this. Thanks, Alex make_average_surface --su

Re: [Freesurfer] Subgenual surfaces

2007-04-20 Thread Alexander Fornito
That would be great. Thanks Bruce. > Hi Alex, > > sorry, this is an unintended consequence of the code that prevents the > surface from deforming into non-cortical structures. I'll see if I can > fix it and get you a new version. > > cheers, > Bruce > On Thu