Hi there,

I performed seed to voxel fc with bivariate correlation and produced second level maps per condition per seed using a within-subjects design.

when I open the saved .nii masks in mricron, or when I plot beta values in SPM, the atan(r) values are SUPER low, they range from 0.05 to 0.3. Most papers with fc threshold their z-maps above say z=3, but this is impossible for me. 

I wanted to know if I should be worried, since the t-values of significant clusters have no bearing on the strength of the correlations themselves.

Any help appreciated. Thanks!

crystal