The effects of dopamine receptor stimulation depend on task demands and neural site of modulation.
(A) A delayed match-to-sample task was used that provides a measure of flexible updating (cognitive switching during encoding) as well as a measure of stabilization (distractor-resistance during the delay). Subjects memorized faces or scenes, depending on the color of the fixation cross. Subjects occasionally switched between encoding faces and scenes. A distractor was presented during a delay. Subjects were instructed to ignore this distractor.