Hello,

may I follow up on the question of the proper specification of the covariates? Are any covariates automatically mean-centered in Conn before the 2nd-level analysis?

For example, the QA variables are often included as covariates of no interest as well as the age. However, on the forum it is often advised to mean-center the Age covariate, but the QA variables are usually not considered. Does it mean that they are mean-centered automatically? Or one should better demean them before usage like any other covariate, e.g. Age or IQ?

Thank you!

Best regards,
Ekaterina.