I am a cognitive neuroscientist interested in the neural mechanisms that support cognitive control and decision making. Much of my career has focused on figuring out the function of anterior cingulate cortex, a poorly understood brain area that is involved in many cognitive tasks. Our working hypothesis is that the ACC uses hierarchically-organized world models to evaluate the reward value of long-term plans against the immediate costs of their execution. To test this hypothesis we follow a "converging methods" approach involving electroencephalography, functional magnetic resonance imaging, lesion studies, and computational modeling. I am also interested in the functions of dorsolateral prefrontal cortex, orbitofrontal cortex and the hippocampus, and neuromodulation of these systems by catecholamines such as dopamine and norepinephrine. This grant will be used to support this research program.