The remarkable complexity and sophistication of our perceptual systems have evolved for ultimately one purpose - to promote efficient and effective action within a constantly changing environment. Traditionally, the route from perception to action has often been viewed as a single, one-directional sequence of stages, which begins with a stimulus presentation and ends with a response. This view has tended to emphasize the separation of perception from action, with the result that studies of stimulus and response processing have often been carried out in isolation from each other. The work in...