The authors acknowledge assistance and critical feedback from B. Cornwell, L. Friedman, J. Hur, C. Kaplan, H. Kim, M. Kuhn, B. Nacewicz, members of the Affective and Translational Neuroscience laboratory, staff of the Maryland Neuroimaging Center, and especially K. DeYoung and J. Smith. This work was partially supported by the California National Primate Center; National Institutes of Health (AA030042, DA040717, MH018921, MH107444, MH121409, MH121735, MH128336, MH129851, OD011107, MH131264, MH132280); University of California, Davis; and University of Maryland.