Carolina,
This is what "gltsym 'SYM: +AY -BY' A_B" and "gltsym 'SYM: +AY[0..11] -BY[0..11]' A_B" do:
1) add up all those 12 effect estimates; and
2) compare the sum between the two conditions.
> Since (3) is a linear operation over the 12 estimated tent coefficients(the pair-wise subtraction
> mentioned above), this are the "tent-wise" coefficients for the linear contrast that we want right?
Correct.
> Is there a way to do this directly with REMLfit or should we just use 3dcalc to calculate all our
> "tent-wise" linear contrasts?
Try double square brackets:
"gltsym 'SYM: +AY[[0..11]] -BY[[0..11]]' A_B"
Gang
