Dear Jane,
there are various utilities around to convert t/con values to other
indices, like correlation coefficients. One of those is in the volumes
toolbox, but I am afraid the newer versions of this toolbox only support
SPM5.
Volkmar
On Tue, 25 Sep 2007, E Jane wrote:
> Hello SPMers,
>
> I am working on analyzing resting state data using SPM2. I have created and
> estimated a design matrix by using a ROI time-series as userdefined
> regressor. I have defined other regressors to account for other
> possible noise sources in the data. Defining a contrast such as +1 (for the
> ROI timeseries and 0 for other regressors), I would be able to tease out
> correlations of the ROI with other voxels. Such a contrast would give me the
> cross correlation between the ROI and other brain voxels, right? How could I
> get the actual cross correlation values? Is this the con* image generated
> during the analysis?
> Another way to do this from the previous posts would be to define a
> model with all regressors whose effect I want to regress out (i.e. all but
> ROI time-series) and use the residuals to extract the ROI timeseries of all
> voxels and cross correlate the voxels of interest. How do I get these
> residual images to extract the time-series for each voxel?
>
> Any help is appreciated,
> Thanks,
>
> Jane
>
--
Volkmar Glauche
-
Department of Neurology [log in to unmask]
Universitaetsklinikum Freiburg Phone 49(0)761-270-5331
Breisacher Str. 64 Fax 49(0)761-270-5416
79106 Freiburg http://fbi.uniklinik-freiburg.de/
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