On Thu, 3 Dec 2009 15:05:14 +0000, Danai Dima
<[log in to unmask]> wrote:
>Dear Bas,
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>
>
>First of all thanks for your reply.
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>After more checking of the acquisition parameters for each group, I came
>across that the group with TR=3s has 36 slices and the group TR=2s has 16
>slices, thus all the others parameters TE, voxel dimensions, interslice gap,
>matrix size and flip angle are identical.
>
>
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>As I understood from your message if this was the case I could be fine and
>perform second level analysis?
You _could_ perform a second level analysis, but most people would consider
it invalid, because the effect of group is completely confounded with the
effect of TR.
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>Best wishes,
>
>
>
>Danai
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