Thanks Jeanette,
I am actually implementing the whole thing in matlab and currently estimate efficiency in the way you described.
Now I wanted to see if I get different results when I use the approach described in smith et al., neuroimage 2006, Eq7.
I have tried to implement this in matlab, but I am not sure if I got i right... *
Having said that, maybe I should just check my code by generating one design and comparing the efficiency values I calculate with those from feat_model ...
Cheers - Guido
*(The designs are all similar, so that peak to peak heights should not be an issue.)
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