I'm interested in the role of mesolimbic dopamine in positive and negative reinforcement. I conducted an experiment measuring dopamine transients in the nucleus accumbens during a novel choice task in which mice chose between the delivery of an appetitive outcome (food pellets) and avoiding an aversive outcome (shocks). I used fast scan cyclic voltammetry in freely moving mice to compare the magnitudes of dopamine signals to these negatively and positively reinforced behaviors.