Hello everyone,

I am working with EEG data and trying to figure out the exact time window during which a significant difference between two conditions occured.

What I have done so far:
I used the ImCalc to create a new image. As input image, I used the corresponding spmT_000X.nii image. As expression, I used abs(i1)>= value of Height threshold T. I assume this expression will give me all voxels that passed this threshold, am I correct here?

Then, I open the new image (Display->Images) and change my colors to Jet.

I can figure out approximate time windows start and end points by moving the crosshair on the maps, but I am afraid that they are not very accurate.

Now, the specific question: is there a way to accurately calculate these time windows?

Thank you very much!