Dear Eric,
> I have encountered what appears to be a bug in the "specify design"
> component of the fMRI module. After determining the onsets of a given
> condition (in the "variable SOAs" path) one is then asked to specify
> the durations of each occurrence of that condition (in the "variable
> durations" path). But, several steps later one is asked to specify a
> (single) duration for each condition, apparently in ignorance of the
> fact that one has specified a vector of such durations for each
> condition previously. Moreover, what one enters at this point seems to
> override the vector of durations entered first. So, it seems that one
> cannot incorporate variable epoch durations into the design matrix. Am
> I missing something or is this a bug?
There have been a few emails about this. The critical thing to
remember is that variable duration epochs are modeled as trains of
events. You should therefore specify events (not epcochs) at the later
stage.
All the very best - Karl
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