Hi All,
I have a study that has two groups of people, each scanned twice. Now I am interested in the main effect of the two groups, but taking into account that they've scanned twice. The group will not be a repeated measure factor but the scan number is. How should I test the main effect of the group?
I have arranged some ANOVA models but ran into rank deficiency problems. The one that worked is attached above. However, it does not reflect the contrast I am interested in. Anyone has any idea how this should be done?
Many thanks,
Ting
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