Re: [Freesurfer] GLM p value display

2013-12-17 Thread Douglas N Greve
The cluster p-value is the significance corrected for multiple comparisons. It is possible for a cluster to be large and yet made up of voxels whose individual significances are low. The p-value for such a cluster may be significant, whereas a small cluster made of individual highly significan

Re: [Freesurfer] GLM p value display

2013-12-17 Thread Celine Louapre
Oh so we don't report the significance itself? because for example if we have a small cluster but highly significant, does the cluster-wise correction p value take it into account? (compared to a large cluster but with lower significance). I may not have completely got this. Thanks Doug Celine > H

Re: [Freesurfer] GLM p value display

2013-12-17 Thread Douglas N Greve
Hi Celine, you should report the clusterwise p-value (which is neither of those). doug On 12/17/2013 12:11 PM, Celine Louapre wrote: > Hi all > I am wondering what is the best to present GLM results in a table on top > of the visual display. > For the significant clusters after clusterwise correc