Hi - I'm afraid I can't really tell what question you're asking - need
more details! In general if you scale a covariate then that doesn't affect
the Z (etc) values associated with that covariate, but will affect
contrasts involving this with other covariates.
Cheers.
On Tue, 2 Nov 2004, Jennifer Bramen wrote:
> Hi All!
>
> I was wondering if there is any effect on scaling when usign a set of FIR basis functions. By
> scaling, I mean if I put something besides a 1 in the 3rd column of a custom design.
>
> Thanks
>
> Jen
>
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
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