Hi Doug, thanks for the response. I will also be looking at some single subject data, that's why I am asking. 

Do you have a hunch? 

Caspar

On Friday, September 20, 2013, Douglas N Greve wrote:

Hi Caspar, I have not looked at it much. The temporal whitening has so
little effect (at least at the group level), that I cannot imagine that
it will make much difference.
doug

On 09/19/2013 09:36 AM, Caspar M. Schwiedrzik wrote:
> Hi Freesurfer Experts,
> mkanalysis-sess seems to default to a FWHM of 20 for the smooting of
> the ACF (in version 5.1). I was wondering whether it makes sense to
> use the same FWHM for volume and surface based analyses of functional
> data in FSFAST? I seem to remember that the autocorrelations differ
> between, e.g., grey and white matter, which might be a reason to use a
> different FWHM on the surface?
>
> Thank you very much,
> Caspar
>
>
>
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Douglas N. Greve, Ph.D.
MGH-NMR Center
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