Dear list,
I am relatively new to SPM and have a quick query about model specification for a sparse event-
related fMRI design.
Specifically, in my design I have a TR of 4 seconds and the delay between one TR commencing and
the next is 16.5 seconds (to allow for stimulus presentation and the HRF). In level one model
specification would I
– specify 16.5 for the Interscan Interval (not the 4s TR);
– specify the SOTs in one long train (seconds) relative to the first SOT (specified as time = 0; Nb.
have set Units of design = seconds, time bins = number of slices).
Many thanks
Christopher
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