What are Event-Related Potentials?
Everytime you see, hear, or feel something, there is electrical activity in your brain related to that event. Those electric potentials can be recorded off the scalp. The amplitude and polarity of the potentials, as well as when they occured, where they occurred, and how long they lasted, are recorded. This information is later analysed by computer to provide clues as to what processes must be taking place. ERPs help cognitive psychologists make guesses as to what kinds of programs your brain is running in response to certain problems.