Hi Tracy,

The main point about longer response function is that
the basis function provided to 3dDeconvolve is indeed
intended to be a response function, notably _not_ just
a stimulus function. If the stimuli last 6 s, one would
expect the response to last at least 18 s, maybe longer.
So TENT(0,18,10) would make more sense.

To be sure, are you expecting the response shapes to
differ across the brain, or at least not to look like
the BLOCK() or SPMG() shapes? What is your reasoning
for using TENT over fixed shape regression?

Right, rest_time.1D should not be included. The default
betas output by 3dDeconvolve are automatically contrasts
against the implicit baseline. If you ask for lefthand
as a GLT, it would simply be the same as that main beta.

- rick