Hi,
I'm having difficulties to decide the best way to use 3dLME in my group analysis. I have two within-subject variables and a trial-level continuous covariate to control for. In analysis of behavioral data, I would also enter subjects and stimulus as random effects, and the latter is a trial-level variable. My question is if it is appropriate for me to calculate single trial betas for 3dLME? Or should I just do condition-wise analysis and discard the continuous covariate and stimulus as a random effect? And is there a better function to use in this case?
Thanks and Merry Christmas Eve!