Post-hoc group contrasts that compare the activation of the comorbid group with that of the pure depression and social anxiety groups. A. To have demonstrated similar activation as one of the two pure diagnostic groups, the comorbid group must have exhibited activation that was not significantly different from the pure diagnostic group, and the activation of both the comorbid and pure diagnostic groups must have been significantly different than controls. To have demonstrated different activation than the two pure diagnostic groups, the comorbid group must have exhibited significantly different activation from both the pure depression and social anxiety groups. B. Each group’s beta estimates of the EWMA z statistic for selected regions. BOLD = blood oxygenation level dependent. EWMA z = exponentially weighted moving average z-statistic (temporally smoothed deviations from baseline period).