Hello,
I'm new to spm, so please excuse my naivety. Using spm2, I want to define my
contrasts using time derivatives, but I want to use a t-test instead of an
f-test. The only documentation I've seen on this topic (regarding use of time
derivatives) seems to only explain the entering the contrasts in an f-test. Is
it possible to use a t-test, and how would these contrasts be entered? I have a
one session, within-subject, event-related design with five conditions. If I
want to make the contrast N1 > N2 with time derivatives, could I enter 1 1 0 -1
-1 0 ... for a t-test? Or is an f-test my only option, and then how would I
specify direction, while also using time derivatives? I hope I asked the
question clearly enough. Thanks for any assistance anyone can offer on this!
~Jenna Greenleaf
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