Dear David:
Yes. I am using dual regression. Sorry I did not mention that previously.
Do you have any clue or references for my questions? Thanks in advance.
Best,
Wei-Ta
2013/2/1 David V. Smith <[log in to unmask]>:
> If you're interested in group differences in networks estimated with ICA,
> then you should use dual regression:
> http://fsl.fmrib.ox.ac.uk/fsl/fslwiki/DualRegression
>
> David
>
> On Feb 1, 2013, at 12:37 AM, ³¯³¹F wrote:
>
> Hi FSL experts:
>
> I am analyzing resting-state functional connectivity data using ICA
> and cluster-based thresholding. Two groups are studied (patients
> [n=18] vs. controls [n=23]). When I check the higher level FEAT
> results (report.html), there are time-series plots (of the peak Z
> voxel) for each contrast (control group, patient group,
> control-patient, patient-control, 4 contrast in total for my study).
>
> My questions are:
> 1. What are the y values of the Time-series plots? Are they beta
> weights or z values? As I know, the x value (0-50) is the numbers of
> the subject.
> 2. When I click the plots for each contrast, two plots of full-model
> fit will pop up. Then I click the "raw data", a four-colume text file
> will pop up. In this text file, I think the values of the most left
> colume are the y values of the time-series plot (as question 1).
> Columes 2 and 3 seems to be contrast-specific values. But I have no
> idea what are the values in the most right columes.
> 3. When I click on a cluster of activation on the color rendered FEAT
> stats, a webpage of "cluster List" table will appear. I would like to
> ask what are the values of Z COG X (mm), Z COG Y and Z COG Z? Another
> question is: why the Z MAX coordinate and COPE MAX coordinate are
> different?
>
> Thanks!!
>
> Best,
>
> Wei-Ta Chen, MD, PhD
> Taipei Veterans General Hospital
>
>
> --------------------------------------------
> David V. Smith, Ph.D.
> Postdoctoral Fellow, Delgado Lab
> Department of Psychology
> Rutgers University
> Newark, NJ 07102
> --------------------------------------------
>
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