Hi,
> Thanks for your answer! What I want to follow-up is....if I'm using a simple
> HRF model, is it justified for me to report the contrast estimates *as* the
> estimated % signal change of contrast A-B in a paper? Are there any
> references for me to study this issue in more detail?
Have a look at:
http://marsbar.sourceforge.net/faq.html#percent_signal
MarsBaR attempts to implement something that is as close as possible
to what most people think of as percent signal change - starting with
the parameter estimates used in the contrast values. The FAQ entry
should give you an idea how this estimate will differ from the SPM
contrast estimate,
Best,
Matthew
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