Gang Wrote:
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> > is there an option for unequal spacing of the
> intervals, i.e. to have more beta
> > weights for the interesting first 20s than for
> the post-stimulus response?
>
> One approach I can think of is to artificially
> break each block into two trial types (as well as
> their timings): the first has a duration of 20s,
> and the other starts at the end of the 20s block.
> Then you can arrange different basis intervals
> between the two.

unequal spacing of TENT functions would be invaluable for block designs since the onset period is of course much more important than the boring plateau phase.... do you think this is on the todo list for afni?

I am trying your suggestion of splitting it up into separate trial types, do you think it is possible to concatenate the -iresp outputs?
also great would be an option to force TENT to zero only on the onset (like the SIN model does, but there it cannot be turned off).