Hi everyone,
I have a very basic question regarding the design of a full factorial model.
For a VBM analysis I want to model an age group interaction between two clinically distinct groups. Both groups have approx. the same age ranges.
In my case I have 36 healthy subjects and 32 diseased, so when building the model I enter each groups scans (MRI/VBM) in a distinct cell. However I am not sure about the levels that I also need to define for each cell.
Maybe someone can help me out with this...
Thanks in advance
Chris
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