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Thanks Rick!

Would using 3dfim+ still give me the information I need? Basically, I need to correlate my beta-series 3d+time data sets with a beta-series seed region (e.g., Seed_betas.1D). The problem is that I am restricting it to correct trials only, so the number of betas per subject will differ. Would 3dDeconvolve still handle the different number of "time-points" in the beta-series 3d+time files? And would the output significantly differ than using 3dfim+ (besides the R^2)?

Thanks,

Danny