After tasting one chip, you may find yourself wanting more. Before you know it, you’ve consumed the entire bag of chips! This phenomenon is called the priming effect of rewards. A taste of a reward may increase motivation to obtain more of that reward. The priming effect has primarily been studied with an artificial reward (i.e., electrical brain stimulation). We are investigating whether the priming effect extends to natural rewards such as food (like in the example above) and the role of dopamine, a neurotransmitter important for motivation, in the priming effect of rewards.