afni.nimh.nih.gov

I have one additional question: If I wanted to get the linear relationship between regional signal changes and number of distractors, would I have to make an additional glt, e.g., +easy[1] +difficult[1] or the +easy[1] -difficult[1] glt will give me that?. I would like to get clusters in the brain that indicate signal change going up as the number of distractors goes up as well.

Thanks a lot.