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help > RE: NBS Design matrix for EEG connectivity
Nov 26, 2021 11:11 PM | Andrew Zalesky
RE: NBS Design matrix for EEG connectivity
Hi Tyler,
take a look at the NBS Manual or click on the Help button. Numerous design matrix examples are provided.
For you experiment, you would perform a repeated measures t-test. It is repeated measures because the two measurements are acquired for each subject (i.e., pre and post).
The concatenated connectivity matrices should be of dimensions 32 x 32 x N, where N is double the number of subjects. Double because each subject has a pre and post connectivity matrix.
I am not sure why the third dimension is 2 in your case.
The number of rows in the design matrix must equal N.
best,
Andrew
Originally posted by Tyler Durden:
take a look at the NBS Manual or click on the Help button. Numerous design matrix examples are provided.
For you experiment, you would perform a repeated measures t-test. It is repeated measures because the two measurements are acquired for each subject (i.e., pre and post).
The concatenated connectivity matrices should be of dimensions 32 x 32 x N, where N is double the number of subjects. Double because each subject has a pre and post connectivity matrix.
I am not sure why the third dimension is 2 in your case.
The number of rows in the design matrix must equal N.
best,
Andrew
Originally posted by Tyler Durden:
Dear all,
I have two connectivity matrices (32 channel EEG) holding average phase lag indices of Condition A (pre) and Condition B (post) and I aim to compare them using the network based statistics toolbox (NBS). The concatenated connectivity matrix has the dimension 32x32x2. I also loaded the node coordinates. However I have trouble understanding the design matrix. What does the matrix need to look like if I want to obtain the statistical differences between both matrices? I tried some example but I always get the error: "Design matrix not found or inconsistent". I hope you can help me!
Best,
T.
I have two connectivity matrices (32 channel EEG) holding average phase lag indices of Condition A (pre) and Condition B (post) and I aim to compare them using the network based statistics toolbox (NBS). The concatenated connectivity matrix has the dimension 32x32x2. I also loaded the node coordinates. However I have trouble understanding the design matrix. What does the matrix need to look like if I want to obtain the statistical differences between both matrices? I tried some example but I always get the error: "Design matrix not found or inconsistent". I hope you can help me!
Best,
T.
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| Title | Author | Date |
|---|---|---|
| Tyler Durden | Nov 26, 2021 | |
| Andrew Zalesky | Nov 26, 2021 | |
| Tyler Durden | Nov 30, 2021 | |
| Andrew Zalesky | Dec 1, 2021 | |
| Tyler Durden | Dec 7, 2021 | |