Skinner defined reinforcers according to the change in response
strength rather than to more subjective criteria, such as what is
pleasurable or valuable to someone. Accordingly, activities, foods or
items considered pleasant or enjoyable may not necessarily be
reinforcing (because they produce no increase in the response preceding
them).
Stimuli, settings, and activities only fit the definition of
reinforcers if the behavior that immediately precedes the potential
reinforcer increases in similar situations in the future, for example, a
child who receives a cookie when he or she asks for one. If the
frequency of "cookie-requesting behavior" increases, the cookie can be
seen as reinforcing "cookie-requesting behavior". If however,
"cookie-requesting behavior" does not increase the cookie cannot be
considered reinforcing.
The sole criteria that determines if an item, activity, or food is
reinforcing is the change in probability of a behavior after
administration of that potential reinforcer. Other theories may focus on
additional factors such as whether the person expected the strategy to
work at some point, but in the behavioral theory, reinforcement is
descriptive of an increased probability of a response.
The study of reinforcement has produced an enormous body of reproducible experimental results. Reinforcement is the central concept and procedure in special education, applied behavior analysis, and the experimental analysis of behavior
support is reportedly reinforced person or support.
Positive reinforcement :
It is to provide comfortable motive that
followed behavior of the individual and increases prospects for the emergence
of similar positions later. (Davidoph
.1985)
Further ideas and concepts:
- Distinguishing between positive and negative can be difficult and may not always be necessary; focusing on what is being removed or added and how it is being removed or added will determine the nature of the reinforcement.
- Negative reinforcement is not punishment. The two, as explained above, differ in the increase (negative reinforcement) or decrease (punishment) of the future probability of a response. However, in negative reinforcement, the stimulus is an aversive stimulus, which if presented contingent on a response, may also function as a positive punisher.
- The increase in behavior is independent of (i.e. not related to) whether or not the organism finds the reinforcer to be pleasant or aversive. Example: A child is given detention for acting up in school, but the frequency of the bad behavior increases. Thus, the detention is a reinforcer (could be positive or negative) even if the detention is not a pleasant stimuli, perhaps because the child now feels like a "rebel" or sees it as an opportunity to get out of class.
- Some reinforcement can be simultaneously positive and negative, such as a drug addict taking drugs for the added euphoria (a positive feeling) and eliminating withdrawal symptoms (which would be a negative feeling). Or, in a warm room, a current of external air serves as positive reinforcement because it is pleasantly cool and as negative reinforcement because it removes uncomfortable hot air.



