Figure 5. Choice selectivity on correct and error trials.

Scatterplots showing, on a neuron-by-neuron basis, the peak ROC choice-selectivity value computed on correct versus error trials. Both values were computed from spiking data occurring at the time of peak ROC-based choice selectivity from correct trials for the given neuron. Black/gray points correspond to data from high/middle coherence stimuli. The line in each panel is the line of unity. The panels show data computed relative to different task epochs (from left to right): stimulus onset, inferred decision commitment, onset of joystick movement, and time of reward delivery. Across all epochs, error ROC values tended to be smaller than correct ROC values (Wilcoxon sign-rank test for H₀: median ROC values are the same, p<0.05). Different panels have different numbers of data points because for some sessions, there were not enough trials to reliably calculate the error ROC.