The flow of time underlies all processes in nature, and the perception of time in the seconds to minutes range, referred to as interval timing, provides animals with a framework to efficiently meet the demands and constraints of a dynamic environment. Interval timing has been proposed to serve as a substrate for optimal foraging and associative learning and may provide a context for conscious awareness. Furthermore, alterations in the perception of time might contribute to the use and abuse of addictive drugs. Although the basic psychophysical properties have been well characterized, the neural structures and neural computational processes underlying interval timing remain unclear. The primary focus of the lab is to elucidate the psychological and neuronal bases of time perception.