--- Jerry Allison <[log in to unmask]> wrote:
> We are analyzing data from a bloc design fMRI study (2 condtitions Right
> eye (R) and Left eye (L), two different groups of subjects Young (Y) and
> Old (O). We want to perform group comparisons on the second level. We
> are interested in the four contrasts:
>
> (YR-YL)>(OR-OL)
> (YL-YR)>(OL-OR)
> (OR-OL)>(YR-YL)
> (OL-OR)>(YL-YR)
>
> Contrasts at the first level were computed as follows:
>
> Con_0003.img was computed as R-L for both groups using an implicit
> baseline contrast specification [1 0 0]
>
> Con_0004.img was computed as L-R for both groups using an implicit
> baseline contrast specification [0 1 0]
?? Doesn't that have to be 1 -1 and -1 1??
--Jess
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