Hi - FEAT only ever passes up raw unmasked COPEs anyway - so anything
you do in post-stats at the first-level has no effect on the higher-
level analysis.
Cheers.
On 5 Oct 2007, at 00:00, Lucina Uddin wrote:
> Hi, I have a question regarding the Pre-threshold masking option in
> FEAT. As I understand it, this is an option when one wants to
> constrain one's search for activation within a specified ROI. Is it
> appropriate to apply an ROI mask at the individual subject level
> (i.e. in a first-level analysis) and carry through the results to a
> higher level analysis, or should the masking only be done at the
> highest-level when looking for group differences within that mask?
> Thanks in advance for your help,
>
> Lucina
>
>
> Lucina Q. Uddin, Ph.D.
> New York University
> Child Study Center
> 215 Lexington Avenue
> 14th Floor
> New York, NY 10016
> (212) 263-4673
> [log in to unmask]
>
>
>
>
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Stephen M. Smith, Professor of Biomedical Engineering
Associate Director, Oxford University FMRIB Centre
FMRIB, JR 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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