Hi,
I have an urgent question about analyzing a mixed block/event-related design (coding both sustained/state-related and transient/item-related activity) within the same GLM. In different papers (e.g., Braver et al., 2003; Jimura & Braver, 2009), blocks and events are modeled within the same GLM but convolved with different basis functions (canonical HRF double gamma function for sustained regressors vs. FIR without assumption about the shape of the HRF for transient regressors).
How can I specify different basis functions for different predictors in SPM (may you have any script on this type of specifiying the 1st level design matrix)?
Thank you so much in advance for your help.
Sandra
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