Hello,

I have been using the result of first level analysis (GLM, bivariate correlation, ROI-ROI, hrf weight) as the weighted connectivity matrix between ROIs for further functional connectivity network analysis. However, I noticed that these matrices (stored at e.g. resultsROI_condition1.mat as Z matrices for all subjects) are not symmetric. Aren't these supposed to show functional connectivity, as bivariate correlation, between the ROIs and be symmetric (Z= transpose(Z) for each subject)? Am I missing something here or looking at the wrong file?

Thanks much for your help,
Shabnam