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You should be using the flexible factorial module and including a subject
factor in the design matrix.

Best Regards,
Donald McLaren, PhD


On Wed, Sep 9, 2015 at 4:45 AM, 栩Xu龚Gong <[log in to unmask]> wrote:

> Dear SPM experts,
>
> My experiment is a 2*3 within-subject design. In the 2nd-level analysis, I
> use the 2*3 full factorial model. I found the brain activation in the
> interaction(F-contrast). However, I am not sure how to explain this 2*3
> interaction?  Would you please give me more information about this? Thanks!
>
> Best regards,
> Xu
>
>