Hi. I’d like to use TDT to analyse data from a factorial fMRI study. I’m interested in comparing two of the conditions (A and B), but because of the factorial design (including conditions X/Y and R/S) I have four beta images for each condition (AXR, AXS, AYR, AYS, etc.). I could reanalyse the data pretending that the other conditions don’t exist, but that feels like bad practice. Is there a way of combining beta images across irrelevant factors for input into TDT?