 |
 |
Dear Eduardo, Note that using the FWE correction over the whole brain is a very conservative approach as many of the fMRI people on the list will tell you. It should only be used when you have no idea what you are looking for and want to be sure your finding is not accidental. When you know IN ADVANCE what areas you are interested in it's standard practice to use small volume correction for these areas. Best, Vladimir On Mon, Sep 7, 2009 at 11:45 AM, Eduardo Garza<[log in to unmask]> wrote: > Hi again, > > I did what Vladimir said and it worked fine. I used the baseline time window (-100 > 0) in the Paired t-test, and I got smaller clusters of activation with a the t > contrast. > > Though for one of the conditions FWE .05 yielded good localized results, for > another condition I had to use Uncorrected .0005 instead to get better clusters. > Any comments on that? > > I also performed a Region of Interest using Marsbar and got significant results in > the regions I was interested, while regions without data were not significant. > > Thanks again > > kind regards > > Eduardo >