Hi Gang,

I didn’t set any option for center, so it went with the default. I’m not too sure if I needed to do it. We are comparing two sets of responses by participants (so the same participants) in the ttest and then adding in the participants trait scale scores as the covariate.

When compared to without the covariate, the areas that come up are very different, basically two different sets of results.

A little bit more information…
Right now, two areas of interest come up when we use a p value of < 0.005, the ventrolateral prefrontal cortex with a cluster size of 162 and dorsomedial prefrontal cortex with a cluster size of 54. I have also attached the script that we used.

Thanks,
Ambrose