Dear AFNI experts,

I was wondering what the default var-cov structure is in 3dLME.

I’d like to specify an unstructured var-cov matrix for my analyses, and I think know how to do this, but just to be sure I’d like to run it by you. My model has the following variables: 1 GROUP variable, 3 within subject repeated measures (W1-3) and 1 covariate (COV):

-model “GROUP * W1 * W2 * W3 + COV” -qVars “COV”
-ranEff “~1”
-corStr “corSymm(form=~1|Subj)”\

Do you agree that this is the correct way of specifying my model with an unstructured cov-var matrix? And do I understand correctly that ranEff ~1 is being converted to ~1|Subj automatically by 3dLME?

Thanks for your help!

Best
Hans