Dear SPM5 users,
I would like to know if it is possible to modulate the effect of one
condition with several parameters ?
e.g. my condition codes for the trials where a digit was presented on the
screen (as a function of onset times) and the two variables I would like to
use for parametric modulation are the x and y positions of the digit
relative to the screen center.
I did not figure out how to assign more than one parameter to the same
condition without replicating the column corresponding to this condition in
the design matrix.
Thanks for your help
Michael
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