Hi,
I am trying to create a contrast based on subject choices (A or B) during 4 different conditions (1-4)
I have 8 different regressors based on each trial's condition and subject choice
e.g. Cond 1 choice A
Cond 1 choice B
Cond 2 choice A
Cond 2 choice B .... and so on.
I am trying to create a contrast of choice A vs choice B, and currently for gltsym I have this:
+ Cond 1 choice A + cond 2 choice A + cond 3 choice A + cond 4 choice A - Cond 1 choice B - cond 2 choice B - cond 3 choice B - cond 4 choice B
However, because I cannot control subject choices, these 8 regressors all have different numbers of trials. Is that bad? How can I view a contrast of A vs B?
Thank you,
Grace