This is not needed or recommended. Not needed because you are already averaging over space and not recommended because it would cause one region to bleed over into another.

On 11/3/2020 7:00 AM, Hye Min Shin wrote:

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Hello experts,

So I understand that when doing mri_glmfit you want to use smoothed surface maps to comply with random field theory while controlling for multiple comparisons (as discussed here: *MailScanner has detected a possible fraud attempt from "secure-web.cisco.com" claiming to be* https://www.mail-archive.com/freesurfer@nmr.mgh.harvard.edu/msg67902.html https://secure-web.cisco.com/1pNAU-NVIkRxQvX9B5btXENpnudT80URPA00UsXPU064w3aUW_OaoZyIsU5NouMPdeCqme_69nHwP4qY41_WBNPcHd8oC2GMFd1DoY894Y9xS_8eLF44pu50UoeiVxYWALBXvirnf1pwSIZJsIL3BAu2_Rp94HyBmMmFnKl7zmtONnvA8zyW5grRM_WBQqpGpdMgxR9TJh5-m4dkUtEnfYw/https%3A%2F%2Fwww.mail-archive.com%2Ffreesurfer%40nmr.mgh.harvard.edu%2Fmsg67902.html).

But I was also wondering whether we have to smooth surface maps when using mri_anatomical_stats to extract anatomical measurements? I see that mri_anatomical_stats has the option to smooth by # of iterations but is there a way to know how many # of iterations would equal let's say 15 FWHM?

Best, Julia Shin

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