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Secondary Reinforcement Based on Primary Brain Stimulation Reward

15 rats were trained to run in a straight runway for rewarding brain stimulation (ESB). A consistent color of goal box—ESB reward pairing existed during runway training. When subsequently rested in a T-maze where the goal box associated with ESB was placed on the initially nonpreferred side, Ss learned to run to that side with only the goal-box color as the reward. The results are held to conclusively demonstrate that secondary reward can be based on ESB as a primary reward. Also, results appear to challenge the view that drive is necessary for the demonstration of secondary reward.