Claire,

How many tents did you use to capture the hemodynamic response curves?

> 1) Is there any correct statistical way to calculate percent signal change
> by getting an average of the betas between two time points and then
> using this information plus some (say) average of the variances/degrees
> of freedom to carry forward into the level 2 analysis? Or will I need to
> actually compare only one time point at a time and use the Tmaps at
> each time point that comes out of the deconvolution (seems like a lot
> of tests; it would be nice to keep it to one test which is why something
> like PSC or AUC appears better).

What two points are you referring to when averaging? AUC is not necessarily a good approach at the group level. Do you have other explanatory variables such as Group or Condition at the group level?

Gang