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Dear Yangmei,
Are the first two runs repeated conditions - e.g. is the experiment:

Run 1:  A1B1 and A1B2
Run 2:  A1B1 and A1B2
Run 3:  A2B1 and A2B2
Run 4:  A2B1 and A2B2
?

Kind Regards
Matthew
--------------------------------
Dr Matthew Webster
FMRIB Centre 
John Radcliffe Hospital
University of Oxford

On 6 Nov 2019, at 08:05, Yangmei luo <[log in to unmask]> wrote:

Dear FSL experts,

I have a complicated design so I'd appreciate some help.

My experiment is a 2*2 within-subject design. My experiment has 4 runs, and the first two runs included condition A1B1 and A1B2, and the second two runs included condition A2B1 and A2B2. I modeled 2-factor and 2-level on the run level.

Given that each level (A1 and A2) has two runs, I would like to model linear habituation between runs for A1 and A2 at the subject level, respectively. How could I set in the GLM design at the subject level?

All the best,

Yangmei

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