Hi - I just tested this here and it does give the same answer in both
cases - are you sure that you're NOT using the (Z>0) option?
Cheers, Steve.
On Tue, 23 Aug 2005, Chris Kelly wrote:
> Hi,
>
> I'm running post-contrast masking on a higher level analysis. I would expect that, if I masked
> contrast A with contrast B, I would get the same result as if I did it the other way around (mask B with
> A), but I don't. I'm wondering why there seems to be directionality when doing conjugations. Is it an
> issue of the voxel corrections?
>
> Thanks,
> Chris Kelly
> fMRI Center, Columbia University
>
--
Stephen M. Smith DPhil
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
|