Dear SPM experts,
I am looking for some advice on building a contrast design matrix of a longitudinal VBM for statistical analysis. I have 1 group of patients(n=19) with 2 time points MRIs.
I am running into an error where the SPM.mat file when displayed in the contrast manager appears distorted and has error defining contrasts. I have displayed an image of it in the attachments above.
In the design matrix displayed after the model estimation step, it shows no errors and looks similar to the one shown in the CAT12 manual.
Thank you very much in advance,
Channelle Tham
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