The source of temporal order in human behavior is cuIrently the subject of a debate between two principal approaches to the study of motor behavior, the motor programming approach and the task-dynamic approach Advocates of motor progsamming argue that timing is determined by a neurally instantiated motor program that imposes temporal order on the remaining components of the motor system. Advocates of the task-dynamic approach argue that timing is determined by a task-specific dynamic assembled from the various components of a perception/action system. The key difference is in the apploaches' respective treatment of perception. I will argue that perception muSst be apportioned a strong role in the organization and maintenance of timing as advocated by the task-dynamic approach.