On 11/28/2016 03:45 PM, Elijah Mak wrote:
Dear Doug,
Thanks.
Do you mean use ROI averages as the samples and then test across ROIs? This would be unusual as the interpretation is problematic. I would probably compute a single number per subject that is a weighted sum/difference of the ROI values, then test whether this one number is different across subjects.Probably a silly question.. but how can I get the data at the subject-level as the effectsize.mgh is derived at the group-level after mri_glmft?
Good question. I guess it depends on what you are trying to test. What are you trying to show? What statistical test would you do?
On a similar note, if I want to simply report the effect size of a significant cluster, could I use mri_glmfit to extract the averaged effect size for the cluster by feeding it as a mask to mri_segstats?
I guess so, but that will be biased in that the cluster will have a high effect size because that is what will make it a cluster
Best Wishes, Elijah
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