Dear Andy,
Thanks for your reply. So, for a brief stimulus lasting 1 ms, how can I make sure that the HRF model is ok or not? I mean, where in the SPM GUI can I check if the model is ok?
Btw, is there concensus about the duration to be specified in the GLM model? In my case, 0.001 s, 0.5 s, or 1 s?
Thanks a lot.
Mark
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