Reinforcement The process by which a stimulus increases the probability that a preceding behavior will be repeated.
Positive Reinforcement A stimulus added to the environment that brings about the increase in a preceding response. Example: A father gives candy to his son after he picks up his toys.
Negative Reinforcement An unpleasant stimulus whose removal leads to an increase in the probability that a preceding response will be repeated in the future. Example: Class is boring so you doodle on your paper or fall asleep.
Punishment A stimulus that decreases the probability that a previous behavior will occur again.
Positive Punishment Punishment that weakens a response through the application of an unpleasant stimulus. Example: Getting a speeding ticket and having to complete 48 hours of community service.
Negative Punishment Punishment that consists of the removal of something pleasant. Example: Taking away your kids car keys for being home after curfew.