Dear SPMers
In my fMRI experiment, there are 2 conditions A and B. In my design matrix,
there will be three condition (three coloum), first coloum for all conditions,
second for condition A and the third coloum for condition B. But because the
first coloum is a linear combination of cond A and B, the beta for this
regressor is not uniquely specified, i.e. appears gray in the estimability. I need
to consider the first coloum (all condition ) because I want to consider it as
my input in the DCM. I've tried to run the DCM and I,ve got all the value. My
question is are all the values valid and is my design matrix valid.
I really2 need helps on this matter. Thank you.
Regards
Mazly
UKM postgrad students.
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