Hello SPM, I have been running PEB models and identified a few parameters that I want to try to cross-validate. My question is how to enter them in the 'Fields' portion of the batch interface of PEB-cross-validation. If I for example have 10 parameters in my A matrix and I want to input only number 2 and 8, how would i format my input? presumably {'A(something...)'} Very much Thanks for any help with this Andreas