- Punishment (psychology)
operant conditioning, punishment is any change in a human or animal's surroundings that occurs after a given behavior or response which reduces the likelihood of that behavior occurring again in the future. As with reinforcement, it is the "behavior", not the animal, that is punished. Whether a change is or is not punishing is only known by its effect on the rate of the behavior, not by any "hostile" or aversive features of the change. For example, painful stimulation which would serve as a punisher in many cases serves to reinforce some behaviors of the masochist.
Types of punishment
There are two types of punishment in operant conditioning:
*positive punishment or type I punishment, an experimenter punishes a response by adding an aversive stimulus into the animal's surroundings (a brief electric shock, for example).
*negative punishment or type II punishment, a positive reinforcer is removed (as in the removal of a feeding dish). As with reinforcement, it is not usually necessary to speak of positive and negative in regard to punishment.
Punishment is not a mirror effect of reinforcement. In experiments with laboratory animals and studies with children, punishment decreases the likelihood of a previously reinforced response only temporarily, and it can produce other "emotional" behavior (wing-flapping in pigeons, for example) and physiological changes (increased heart rate, for example) that have no clear equivalents in reinforcement.
Punishment is considered by some behavioral psychologists to be a "primary process" – a completely independent phenomenon of learning, distinct from reinforcement. Others see it as a category of negative reinforcement, creating a situation in which any punishment-avoiding behavior (even standing still) is reinforced.
Punishment and aversives
"Aversive stimulus", "punisher", and "punishing stimulus" are somewhat synonymous. "Punishment" may be used for (a) an aversive stimulus or (b) the occurrence of any punishing change or (c) the part of an experiment in which a particular response is punished. However, some things considered aversive (such as
spankingin BDSM) can become reinforcing. In addition, some things that are aversive may not be punishing if accompanying changes are reinforcing. A classic example would be mis-behavior that is 'punished' by a teacher but actually increases over time due to the reinforcing effects of attention on the student.
Applied behavior analysis
Punishment is sometimes used by treatment programs such as
applied behavior analysisto reduce dangerous behaviors such as head banging or biting exhibited by autistic children. Punishment is considered one of the ethical challenges to autism treatmentand is one of the major reasons for discussion of professionalizing behavior analysis. Professionalizing behavior analysis through licensure would create a board to ensure that consumers or families had a place to air disputes. (see Professional practice of behavior analysis)
*Skinner, B. F. (1938) "The behavior of organisms." New York: Appleton-Century-Crofts.
*Chance, Paul. (2003) "Learning and Behavior." 5th edition Toronto: Thomson-Wadsworth.
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