Hi - I am fairly sure that everthing you have said is correct.
Good luck!
Steve.
On Thu, 3 Apr 2003, Zrinka Bilusic wrote:
> Hi,
> I would like to apply pre-threshold masking in my Paired t test
> higer-level analysis. I am confused about the space the mask needs to
> be in. In the single subject analysis, as I understand, the mask needs
> to be in the low-res (functional) space such that it matches the
> statistical data. I do have masks for each subject separately in their
> high-res space that I can easily transform to the low-res space. But in
> the higher-level analysis - what mask should I use and in what space?
> It seems to me that in the group analysis I should have one map for
> 'the group' and it should be in the standard space? (I would in this
> case, choose one subject's mask - since all mask represent the same
> areas - transform it to standard space and use it as a 'group' mask) Is
> this correct?
>
> Thank you!
>
> zrinka
>
Stephen M. Smith MA DPhil CEng MIEE
Associate Director, FMRIB and Analysis Research Coordinator
Oxford University Centre for Functional MRI of the Brain
John Radcliffe Hospital, Headington, Oxford OX3 9DU, UK
+44 (0) 1865 222726 (fax 222717)
[log in to unmask] http://www.fmrib.ox.ac.uk/~steve
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