Influence of task context on response-choice activity.

(A) Scatter plot for each caudate neuron (n = 70) with response-choice activity comparing AROC values computed for single-patch and two-patch conditions. AROC values on the x-axis greater (less) than 0.5 indicate preference for contralateral (“contra”) (ipsilateral [“ipsi”]) hits for two-patch condition; AROC values on the y-axis greater (less) than 0.5 indicate preference for contralateral (ipsilateral) hits for single-patch condition. Color indicates the neuron’s group assignment based on the AROC values: contralateral hits versus ipsilateral hits different from chance for two patches only (Two*; green), contralateral hits versus ipsilateral hits different from chance for single patch only (Single*; blue), contralateral hits versus ipsilateral hits different from chance for both conditions (Both*; purple), and neither different from chance (Neither; gray). (B) Scatter plot of AROC values computed for each caudate neuron tested with the dimming joystick task (n = 70) with response-choice activity for two-patch and dimming joystick conditions. AROC values on the y-axis greater (less) than 0.5 indicate preference for contralateral (ipsilateral) hits for dimming joystick condition. Same conventions as A except that blue color indicates when responses to contralateral hits versus ipsilateral hits are different from chance for joystick task only (Joystick*; blue). (C) Side preference for the motion CD task for CD with two patches (CD), single patch, and joystick task in the population of 70 caudate neurons tested with these three conditions. Each row represents a single neuron across different task conditions during the response choice period (0.3 s): two patches (CD), single patch, and joystick mapping task. Neurons were sorted according their side preference for CD task. Colors indicate side preference (orange for contralateral, blue for ipsilateral, gray for neither [“No pref.”]). Underlying data available in S1 Data. AROC, area under the receiver operating characteristic curve; CD, change detection.