Population analyses. A, Mean firing rate of individual cells in the 1T task when the PT was low-valued (x-axis) versus high-valued (y-axis). Each cross indicates mean and SEM. B, Firing rates comparing 2T trials in which the OT is medium-valued and the PT is low-valued (x) versus high-valued (y). C, Comparison of 2T trials in which the PT is medium-valued and the OT is low-valued (x) versus high-valued (y). D, Comparison of 2T trials in which the PT and OT are medium-valued and are 60° (x) versus 180° apart (y). In all panels, black crosses indicate cells with statistically significant effects (n = 52) along with the rest of the delay-tuned population (n = 60, gray).