Hi FSLers, I have a 2 ( win/loss) X 2 ( high/low) design. Now I have two ways to code my
events.
One way is to code the 2 high ( high win and high loss) and 2 low (low win and low loss)
each as one event and then just do a simple contrast between the two. The other is to code
the 2 high as 2 separate events and the 2 low as separate events and to then do the
contrast as the 2 high events - the 2 low events. These appear to yield different results --
is one preferable / more powerful than the other?
The other question is: will the choice between the 2 alternatives above affect statistics for
contrasts that don't involve those events?
Thanks very much.
Shan
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