Dear Beate,
from an SPM point of view, there is no different treatment of covariates
and nuisance variables. They are all fitted at once - if you are not
interested in the fit of a covariate, just do not perform a test on it
during results query.
Volkmar
On Sat, 2 Jun 2007, Beate Hartinger wrote:
> Dear SPM experts,
> Can anybody help me to define a covariate of no interest in SPM5 (PET, full
> factorial)
> In the Covariate section I have entered one (or more) covariate(s): centered
> around overall mean and interaction with Factor to get my covariate of
> interest and for my covariate of no interest: centered as implied my ANCOVA
> with no interactions. The design matrix only shows covariates and no
> nuisance. What did I do wrong? :(
>
> I would highly appreciate any help!
>
> Best regards
> Beate
>
--
Volkmar Glauche
-
Department of Neurology [log in to unmask]
Universitaetsklinikum Freiburg Phone 49(0)761-270-5331
Breisacher Str. 64 Fax 49(0)761-270-5416
79106 Freiburg http://fbi.uniklinik-freiburg.de/
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