Hi,
Yes - that looks right.
Cheers.
On 17 Aug 2009, at 18:20, Tal Herbsman wrote:
> I have the following experimental paradigm:
>
>
> 1. patient and healthy control groups
> 2. each subject has two separate scanning sessions on 2 days
> 3. on each day subject has fMRI task followed by a)active substance
> OR b)placebo
> administration and repeat fMRI task
>
> I wanted to confirm proper design matrix construction to test the
> question of whether
> activation deltas (post - pre substance administration) differ among
> group A and B
>
> My thought is to use a variation of the Multi-Session & Multi-
> Subject (Repeated Measures
> - Three Level Analysis) scenario on the FEAT webpage but instead of
> running the initial
> fixed effects analysis on subject mean COPEs, run it instead on
> COPEs generated by a
> fixed effect analysis of before and after condition for each subject.
>
> Not sure if this is correct or how to design the matrix. Any advice
> would be much
> appreciated.
>
> Tal.
>
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Stephen M. Smith, Professor of Biomedical Engineering
Associate Director, Oxford University FMRIB Centre
FMRIB, JR Hospital, Headington, Oxford OX3 9DU, UK
+44 (0) 1865 222726 (fax 222717)
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