ABSTRACT
Fast and accurate actions in response to perceptual events are required in many situations. For example, if a person is driving in the middle lane of a freeway that has three or more lanes in each direction, and a vehicle in the right adjacent lane starts to move into the middle lane, the driver must make a rapid controlling action upon detection of this event in order to avoid a collision. Depending on the context in which this scenario occurs, the required action may be to step on the brake, to accelerate quickly, or to steer the vehicle into the lane immediately to the left. There are many factors that influence the speed and accuracy with which an appropriate action can be taken. Although some of these do not involve response selection (e.g., perceiving the stimulus event), many of them do.
