Online degree, online education, part 25. APPLIED BEHAVIOR ANALYSIS

APPLIED BEHAVIOR ANALYSIS
Applied behavior analysis is a methodology for systematically applying the principles of learning theory to develop interventions that will improve socially significant behaviors to a meaningful degree, as well as demonstrate that the interventions employed are responsible for the improvement in behavior. Applied behavior analysis has been repeatedly demonstrated to be a highly effective approach across a wide range of problems and environments, including education, mental health and mental retardation, parent training, environmental management, and organizational management. Applied behavior analysis is a specialty used by various professions. It is not regulated by most states, except as part of psychology or other established professions, although there have been a few attempts to recognize trained and qualified behavior analysts over the years. Most recently the nonprofit Behavior Analyst Certification Board has promoted a national certification program to identify and credential qualified practitioners and trainers.

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Principles and Techniques
Several terms besides applied behavior analysis have been used to describe intervention methods based on behavioral learning theories, including behavior modification, behavior therapy, and others. Although sometimes used interchangeably, there are possible distinctions made. Applied behavior analysis is used most often for the orientation that derives predominantly from Skinnerian operant conditioning and follows a radical behavioral philosophy. Although other behavioral orientations often utilize operant principles to differing degrees, they typically place a greater emphasis on classical conditioning processes (the neo-behavioristic mediational model) or cognitions and perceptions as targets for change (social learning theory and cognitive behavior modification) than does applied behavior analysis.
Operant conditioning eschews hypothetical mental constructs as explanatory contracts. Behaviors are viewed as being selected by environmental consequences, much like adaptive changes are in Darwinian evolution, rather than being emitted to serve some future purpose. That is, a child does not cry in order to attract attention but cries because crying has resulted in reinforcing consequences in similar situations in the past (unless, of course, the crying is in response to actual physical discomfort).
The central precept of applied behavior analysis is that behaviors are under the control of environmental stimuli. Functional relationships are described by a three-term contingency that consists of antecedents, responses (behaviors), and consequences. At times these are referred to as the ABCs of behavior. Early uses of behavior analysis focused primarily on changing behaviors through manipulating consequences. All consequences are seen as directly influencing whether behaviors will recur in the future. Conse-quences can be grouped into three main types: reinforcing, punishing, or neutral stimuli.
The first class of consequences, reinforcers, consists of events that increase the future probability of a behavior they immediately follow. These include events that strengthen behaviors when they are presented following the behavior, such as food, attention, or social praise. This operation is referred to as positive reinforcement. For example, a child may learn to apologize because the apology consistently is followed by parental praise. Behaviors also can be strengthened through the removal of an aversive (negative) stimulus following a behavior. This operation is termed negative reinforcement. This would be the case if a child learns to apologize if the apology terminates (or avoids) being scolded by his or her parents.
Reinforcers can either be biologically preestablished (primary reinforcers), such as food or water, or can acquire reinforcing properties through careful pairing with primary reinforcers (conditioned reinforcers).

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Most reinforcers are differentially effective with different people rather than being universal. This is particularly true of conditioned reinforcers such as praise or tokens. The schedule of reinforcement used to deliver reinforcers also is important. Early in the process of strengthening a behavior, reinforcers are typically delivered on a continuous schedule, where a reinforcer is given each time the response occurs. Later in the process, various schedules are used that deliver reinforcers more intermittently and help increase resistance to extinction and/or produce specific types of responding patterns.
Punishment consists of two operations, but these weaken the likelihood of behaviors recurring. In positive punishment, the presentation of the consequence following the behavior results in weakening future occurrences of a behavior. An example might be a brief swat on the bottom when a young child chases a ball into the street. Removing a reinforcing stimulus contingent upon a behavior also can weaken it. This is negative punishment and includes, for example, taking away television-watching privileges for a short time to weaken a child's lying behavior. Applied behavior analysts typically advocate negative punishment as a more appropriate reductive method in most cases.
Behavior also may be decreased through the use of extinction, where the connection between a response and its maintaining consequences is discontinued, leading to a progressive decline in the rate of a previously reinforced response.
Antecedents, which are the front end of the three-term contingency, influence behaviors largely through a prior history of differential association with reinforcing or punishing consequences. When a child's behavior has been reinforced previously in a situation, the likelihood of that behavior is heightened under similar circumstances. It is lowered in situations in which reinforcement has been consistently withheld or punished. For example, a child whose father con-sistently buys him candy in a store when he whines is likely to exhibit similar behaviors in the future when shopping with his father. With his mother, who does not "give in," the child will learn not to whine.
Another type of antecedent stimulus used program-matically includes visual, verbal, or physical prompts given to increase the likelihood a child will respond appropriately to the given situation. For example, pictures of objects may be placed with letters to assist a child in learning letter sounds. These can then be removed either abruptly or through a gradual process called fading. Modeling can be seen as a special form of prompting in which someone demonstrates a desired behavior to increase its likelihood.
When a behavior is not present in the individual's repertoire, the procedure of shaping or successive approximations may be used. Shaping involves reinforcing progressively closer approximations of the desired behavior. For example, in teaching new words to a young child, the child is reinforced for vocalizations that are increasingly more like the desired word. As the sequence progresses, the word must be more and more like the target word for the child to receive reinforcement.
Particularly important behavioral concepts for instructional applications include discrimination, generalization, and concept formation. Behaviorally, concept formation occurs when the same response occurs to a group of discriminably different objects that have some aspect in common (as well as responding differently to other classes of stimuli). Concept formation involves both generalization and discrimination: generalization within classes and discrimination between classes. Thus, a child who responds "dog" to different examples of dog but not cats or other animals is exhibiting concept formation.
Many other effective techniques have evolved over time from this relatively small set of basic principles. In addition to those just mentioned, these include procedures such as overcorrection, token economies, time-out, response cost, self-monitoring, and task analysis.

EDITOR Neil J. Salkind
Copyright © 2008 by SAGE Publications, Inc.