afni.nimh.nih.gov

Thanks for the response.

Would concatenating the two runs of data be correct if the baseline conditions in each run were different?

I actually tried running a model wherein the tasks are concatenated- 3dDeconvolve in this case outputs colinearity warnings (becuase run 1 is highly correlated with the regressor for task 1 and run2 is highly correlated with the regressor for task2). I am unsure how this would effect the task beta estimates of activity.

Cheers,
Gerome