Dear all,
I am working with rs-fMRI data collected from four different sites, where the scanning parameters are identical across three of the sites. I want to control for site effects during the 2nd-level analysis by including site as a 2nd-level covariate in CONN toolbox.
To do this, I was planning to create separate 0/1 dummy variables for each site. For example:
- Site1: [1 1 0 0 0 0 0 0]
- Site2: [0 0 1 1 0 0 0 0]
- Site3: [0 0 0 0 1 1 0 0]
- Site4: [0 0 0 0 0 0 1 1]
Is this the correct approach for setting up site covariates in CONN? If not, could you suggest a better way to control for site effects in 2nd-level analysis?
Thank you for your advice!
Best regards,
Huiying Deng