Hello all,

We are interested in measuring whether a single behavioural measure predicts an increase to the BOLD signal in a particular condition of interest. For example, does having a higher IQ augment the activity already associated with a specific task condition in a particular brain region? Can 3dttest++ get at this problem? Is subbrick #2 the equivalent to asking, does the covariate predict the BOLD signal in SetA to a greater extent than it does in SetB? Also, because the covariate subricks involve slopes, are these r^2 values and if so can I extract that value for each cluster?

Thanks,
Steve