Dear FSL users,
I've previously implemented a GLM analysis for our multi-session and multi-subjects design. Now, we are interested in one of the contrasts (e.g. EV1 > EV2), and I want to test if some measures (such as RTs) actually interact with this contrast.
Please note that I have a value (e.g. RT) for each trial, session and subject, so I think I have to set the interaction at the first level of analysis. I've tried to do so adding an additional EV to my first level model with the (demeaned) measure and setting a F contrast between this EV and the contrast of interest (EV1 > EV2). However, when I try to run a fixed effects analysis across sessions, I can't add the results of the F contrast.
My question therefore is if there is a way of testing this interaction in my desing.
Thanks in advance!
Carlos
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