SPM parameter estimability



Hi everyone, as you can see in the image above I come across with this gray areas which is not good. However, I couldn’t solve it even though I used different data or made sure that my design is right. Do you have any ideas what might be the problem?


Hi Beyza,
From what I can see, the design matrix is of full rank and the three parameters are uniquely specified (the three cells are white) so I would not worry about multicollinearity in this design. If you have further concerns, it would help to give more information about the design (first/second level?) and show the design matrix.
Hope this helps,


Hi, you can try my script for first-level analysis. It works for my data.