On Thu, Feb 14, 2013 at 12:47 PM, Li Ling <[log in to unmask]> wrote:
> Hi everyone,
>
> As a new spm user, I'd like to see if there is activation changes between
> two sessions (block design fMRI) of one subject. May I use the first level
> analysis to do it?
Yes. You actually need the first level model to do this analysis.
>
> May I just input the first session scans and condition first, and then add
> the second session, and then define the contrast as [1 -1]? By doing this,
> what is the activation map? Is it really the difference between the two
> sessions?
No. You need to define your blocks for each session, then you need to
compare the block regressors between runs.
>
> Looking forward to hearing advices from you!
>
> Thanks.
>
> Li Ling
>
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