Dear colleagues,
we have designed an experiment in a classical block design (block length
~15 sec) and would like to use DCM to describe the interaction between
brain regions.
For one experimental condition, I assume that some brain regions
receive direct input over the total block length, other regions receive
input (due to strong habituation effects) just at the first few seconds
of each block. The same applies for the modulatory inputs: some
connections are modulated for the total block length, others just at the
beginning of the blocks.
How should I define the design matrix to create the appropriate models?
Best wishes, Andreas
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