Thanks very much! This is very helpful and makes sense. One follow up,
again basic, about two different ways to 'phrase' a contrast. If I want to
compare
(A>B) > (C>D)
I think I can do either this contrast at the first level
A B C D
.5 -.5 -.5 .5
OR these two contrasts at the first level...
A B
1 -1
C D
1 -1
... followed by this one to the resulting con images at the second level:
A>B C>D
1 -1
Correct? Im wondering becaus if I do it the first way it allows group
comparisons more easily
Thank you again
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