I am not sure I understand.

For example here are 4 rows from my design matrix

1 = patient, score, and then patient*score..

So if you are saying 'the result of the multiplication needs to be used in the design matrix' then wouldn't the first line be:

1 91 91

since 1x91 is 91? And then for the patients, it would be 0 for the third column?

1 91 1*91

1 90 1*90



0 117 0*117

0 132 0*132

Where can I find example matrices? I am really interested in NBS.. But I don't quite understand where I am going wrong with the design matrix. 

Also, was the contrast I included correct?

Thanks again for any support..