Dear Jaime,
You should be able to use a two-sample t-test with IQ as covariate (set
'Interactions' to 'With Factor 1').
Best regards,
Guillaume.
On 16/04/18 21:31, Jaime Ide wrote:
> Dear SPM experts,
>
> I would like to compute *group differences* (male x female) in *linear regression*.
> Say, we want to find gender differences for the association between I.Q. with a particular con* image from the 1st level.
> Is this possible or recommended using second-level SPM?
>
> For instance, I see an option for "ANCOVA for PET and VBM (not 2nd level fMRI)" in the SPM manual.
> Does it mean that ANCOVA with 2nd-level fMRI is not possible, or there is another alternative?
>
> Any comments are really appreciated.
> Best regards,
> Jaime
>
--
Guillaume Flandin, PhD
Wellcome Trust Centre for Neuroimaging
University College London
12 Queen Square
London WC1N 3BG
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