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Dears SPMers, I ran a repeated measures flexible factorial anova with the within subject factor condition (repetition) (3 levels) & the between subject factor group (2 levels) following main effects & interactions: Main effect1 subject Main effect 2 group Main effect 3 condition (repetition) Interaction 2 x 3 (group x repetition) the F-contrast for the group x repetition effect revealed significant interaction effects. Now: how can I further analyses the direction of the interaction effect? - My Ideas: 1. t-contrast to test for an directional effect 2. plot the responses Would it be valid? And regarding plotting the responses: should I plot the F contrast or the t-contrast (or is it the same?) Thanks in advance & kind regards ben