Hi Alex,

Something does not look correct. Could you upload the P structure and the SPM.mat for the gPPI analysis. There is something that is being forced to change for an unknown reason.

Did you manually define these contrast vectors or did they get generated by the script?

I can't tell if its do to the column naming or if the columns are too dependent on each other or if something has gone horribly wrong for another reason.

I'll first check the initial contrast, then I'll try to work out why it was changed and what the change means for the interpretation.


Best,
Donald