Visual Tasks.

<p><b>A.</b> Schematic of stimulus for Approach Salient Visual Target task. Subjects were rewarded for licking the water port beneath the image of the statue. <b>B.</b> Schematic of stimulus for the Image Discrimination task. Subjects were rewarded for licking the port beneath the statue, not the space shuttle. <b>C.</b> Schematic of stimulus for Motion Discrimination task. Subjects were rewarded for licking the port on the side toward which the coherent dots moved. <b>D.</b> Schematic of stimulus for orientation discrimination task. Subjects were rewarded for licking the port beneath clockwise rotated bars, not counter-clockwise rotated bars.