Hi Lena,

One can do a DODS (different offset different slope) and DOSS (different offset same slope) GLM analysis in qdec. Did you take this into account in your ROI analysis?

Cheers,

Martin

On Sun, May 23, 2010 at 7:09 PM, Lena Palaniyappan <Lena.Palaniyappan@nottingham.ac.uk> wrote:

While doing an age corrected qdec comparison between two groups, the analysis resulting from ’Does the average thickness differ between two gps’ showed some potential areas of interest. I then created labels from these areas and mapped them back to all subjects. But when I extracted thickness values and looked at the means, I could not see the same direction of effect – why could this be? Is this a problem with smoothing (I used FWHM 20 for looking at whole brain comparisons)

Cheers
Lena

_______________________________________________________
Lena Palaniyappan
PhD student & Honorary StR | Division of Psychiatry ( University of Nottingham)
South Block 'A' floor| Queens Medical Centre | Nottingham | NG7 2UH



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