Hi Marie,
Ah yes, thanks, that was indeed the problem! Strangely though, the Max for that cluster is t=2.488 initially, above the default t=2 Min value in the QDEC visualisation settings! But after pressing the FindClusters button, Max becomes t=1.779 and so the Min probably needs to be lowered in order for the entire cluster (not just its Max vertex) to become visible. Or am I misunderstanding something here?...
Tudor
On 2 February 2014 20:45, Marie Schaer Marie.Schaer@unige.ch wrote:
Hi Tudor,
Seems to me that it could be just a display issue, as you didn't adjust the visualisation threshold (you have min = 2), whereas you run your Monte Carlo with a threshold of 0.05 (i.e. 1.3), and your cluster seem to be just in between.
Hope it helps,
Marie
On Feb 2, 2014, at 10:55 AM, Tudor Popescu tudor3@gmail.com wrote:
Dear Freesurfer experts,
I ran a QDEC analysis for structural data and found, after Monte-Carlo
correction@0.05, one significant cluster, annotated as "postcentral" (see screenshot attached). The stats associated with it are displayed in the terminal, however the statistical map on the template brain is blank.
Also, when I press the "Find Cluster and Go To Max" button, I receive an
error that no stats can be generated for that cluster.
Not sure if it's relevant, but my dependent variables of interest in
this analysis were thickness and local gyrification index (lGI). It seems I'm getting the above problem only when lGI is the DV, and whether or not there is a group factor among the categorical predictors. I do have, however, lGI analyses where the significant cluster shows up fine both on the template and in the terminal window.
Can anyone help? Many thanks in advance!
Best wishes, Tudor <2014.02.02, 18-17-31.png>_______________________________________________ Freesurfer mailing list Freesurfer@nmr.mgh.harvard.edu https://mail.nmr.mgh.harvard.edu/mailman/listinfo/freesurfer
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