afni.nimh.nih.gov

> 1) which Afni program do you recommend to explicitly model
> the interaction in a repeated measures within subject design
> in a 2 x 2 Anova?

A couple of approaches:

1) 3dANOVA3 -type 4
2) The interaction can be directly obtained through a t-test with 3dttetst++ or 3dMEMA for (A1B1-A1B2)-(A2B1-A2B2).

> 2) can I re-use the individual group contrasts calculated from a GroupAna?

Not so sure what this question is about.

Gang

Gang