afni.nimh.nih.gov

> I meant the difference between the chi-sqare values (from group*time, generated automatically) and the z values
> from that contrast. So if they're essentially the same, can I report either one?

Yes, either one is fine since they are conceptually equivalent.

> My goal was to find out if there is a group*time effect. Do I have to report the main effects Time and Group, too?

No, you don't have to if the main effects are not your focus.

Gang