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Hi Renat

> Hi everybody!
>
> We are trying to find age effect interaction between two groups of 
> subjects – roughly speaking
>
> find regions where slope of BOLD signal vs age in one group is 
> significantly different of that of
>
> the other group. What fMRI model under “Basic models” should I use? I 
> don’t see anything
>
> there that seems to do the job.However, there is a PET model, 
> Compare-populations: 1 scan/subject (AnCova) seems to do what
>
> we want, but if we use our fMRI data we get the following error:
>
The PET model should work, even for fMRI data ..
Anyway, you can try a multiple regression analysis where you enter the 
group and the age leading to 3 or 4 cov (depending how you code the 
group), then you can compare the regression on the age of one group 
against the other :-)

Best
Cyril