[image] 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/seco…

Hi, you can try my script for first-level analysis. It works for my data. [image] Script for SPM first-level GLM analysis Hello, I have preprocessed my fMRI data using fmriprep on Ubuntu 18.04. Comcorr and AROMA methods were used to respectively denoise physi…

Thank you a lot for your response! [image] Even though this is a different experiment, the result is the same. I’m just wondering what might be wrong/missing. Best, Beyza

Hi Beyza, This design matrix is of full rank, as illustrated by having all the cells underneath the image in white (and not in grey). Which contrasts are you interested in? Given that there doesn’t seem to be a baseline, this design will only be sensitive to differential effects. You might be inte…

Hi again, I’ll check the document as soon as possible. Before that, the answers are here. This is actually a localizer scan, I’m stimulating three different areas from different visual quadrants (not the whole quadrant). At first, I got three runs with 6TR stimulus-6TR ISI for each location, howeve…

SPM parameter estimability

Shengdong_Chen June 18, 2019, 1:47am 3

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

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