Thanks Matthew
I got it now
I was trying to look at group data!
once I went into the individual SPMs all was good
;)
>>> Matthew Brett <[log in to unmask]> 19/06/2009 06:29 >>>
Hi,
> I'm trying to do ROI % signal extraction in marsbar and everything seems fine
> until I select % signal change then I get the error
>
> need fMRI design for % signal change
The percent signal change routines need some estimate of the
event-related response - for this you need an FMRI design, with
events, basis functions and so-on. It's possible to imagine percent
signal change for things like PET designs, but it requires some
thought about what is the baseline and so on.
Best,
Matthew
|