Hi FSL experts,
I have a multisite fMRI in which I'd like to simply compare patients and healthy individuals, controlling for age, sex and scan site (there are 6 sites). My model is currently set up as follows:
EV1: Group 1 (0 or 1)
EV2: Group 2 (0 or 1)
EV3: Sex (0 or 1)
EV4: Age (continuous variable between 8-12)
EV5: Site 1 (0 or 1)
EV6: Site 2 (0 or 1)
EV7: Site 3 (0 or 1)
EV8: Site 4 (0 or 1)
EV9: Site 5 (0 or 1)
EV10: Site 6 (0 or 1)
My understanding is that I should:
1. demean EV4 only
2. set the "Group" column in FEAT's higher level GLM gui to be = 1 for all rows
Can you confirm that I have this correct?
Many thanks in advance,
Lara
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