Fig. 2
From: Brain substrates for automatic retrieval of value memory in the primate basal ganglia
Passive-viewing tasks for investigating automatic memory retrieval in the primate brain. A Passive-viewing task for monkeys. After long-term learning of object-reward associations, the learned objects were presented while the monkey fixated on a central white dot. In this task, a reward was not associated with the presented objects. B Passive-viewing task for humans. The subject had to report the change in cross color to acquire a monetary reward while previously learned objects were presented. This procedure ensures that the subject focused on the fixation cross and not on the learned objects