Dear SPM experts,
I am interested in checking fatigue effects in my experiment. We specified the design in such a way that we have two blocks [1 and 2] of manually permuted trials i.e. each block of stimulations consists of 36 trials [total of 72 trials across 2 blocks].
We have three conditions / trial-types (A, B, C) appearing in every block (12 each = 12x3=36 trials per block).
Our aim is to check fatigue effects by comparing the activations that appeared in the first block to the ones that appeared in the second block [because the order of the permuted trials is the same in the two blocks].
I would like to know what is the correct way to proceed in terms of first and second analysis?
Thank you very much in advance,
Alec
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