As smoothing as well as GLM are fully linear operations (double check
the equations in the SPM book), and therefore commutative, I do not
think it is mathematically any different (for resulting b/t-values)
whether you first 'regress out' the movement parameters, smooth, and
then do GLM, or smooth, and do GLM with movement parameters included. I
think that's why the order you suggest can't be batched, as it is much
slower and doesn't make any a-priori sense (to me at least).
But perhaps I am overlooking something here, there might be a
non-linearity in the whitening procedure? Others might shed their light
on this.
Why would you prefer one order over the other?
Cheers,
Bas
On 10/31/2012 04:39 PM, Philip R. Baldwin wrote:
>
> Dear SPM,
>
> Is there a batch module that might appear in the batch editor, for
> regressing out head motion during preprocessing? Maybe someone on the
> board has written this?
> Or someone can tell me how to add a module?
>
> I am trying to do a resting state analysis and I feel comfortable
> with the registrations that I get through SPM. I need to regress out
> the head motion before
> smoothing however, and SPM generally regresses out head motion in GLM.
>
> Thank you, Phil Baldwin
> Center for Advanced Magnetic Resonance Imaging
> Houston TX
>
--
--------------------------------------------------
Dr. S.F.W. Neggers
Division of Brain Research
Rudolf Magnus Institute for Neuroscience
Utrecht University Medical Center
Visiting : Heidelberglaan 100, 3584 CX Utrecht
Room B.01.1.03
Mail : Huispost B01.206, P.O. Box 85500
3508 GA Utrecht, the Netherlands
Tel : +31 (0)88 7559609
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E-mail : [log in to unmask]
Web : http://www.neuromri.nl/people/bas-neggers
: http://www.brainsciencetools.com (CEO)
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