Reinforcement - an act performed to strengthen approved behavior.
Positive reinforcement - presentation of a stimulus to increase the likelihood that a behavior will occur again.
Negative reinforcement - removal of a stimulus to increase the likelihood that a behavior will occur again.
Punishment - an act performed to decrease unapproved behavior.
Positive punishment - eg. giving a spanking to decrease unapproved behavior.
Negative punishment - eg. taking away an allowance to decrease unapproved behavior.
Primary reinforcer: something innately satisfying.
Secondary reinforcer: a learned satisfaction.