Hi Gang,
Because accuracy is one of these nuisance covariates, I would like to interpret the brain activity associated with the 4 time periods without the confound of accuracy. That is, accuracy decreases across the four conditions of interest (Time1, Time2, Time3, and Time4). However, I want to detect brain activity that changes with TIme, where the changes do not simply reflect the concomitant changes in accuracy (or confidence or response time).
Christine
