We are considering collapsing across a couple task-based fMRI samples that assess the same construct with slightly different stimuli and on different magnets. Specifiically, they present different tastes (kool-aide, milkshake) with the same control taste for contrast, but also with different paradigm designs. So, I’m trying to figure out a way to control for confounds in our nested CV approach. I’ve come across a few articles re: controlling for confounds in CV. Hoping to apply this to nested CV. n > 780 scans total.