Hi,
I have a block design of 4 conditions ABCD (10 sessions, each contains one
block of each condition), and would like to add an additional regressor
(task performance) into the design matrix for two of the conditions (A and B)
The problem is that it seems parametric modulation requires more than one
block/event per condition in each session, which is not the case in my
experiment if I model it by sessions. I would like to look at
performance-related effects within subjects. I was wondering what
alternative ways might be appropriate here.
Any help will the appreciated.
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