Saturday, March 3, 2012

Principles & Applications Of Operant Conditioning

Operant conditioning is also called instrumental conditioning.

The theory of B.F. Skinner is based upon the idea that learning is a function of change in overt behavior. Changes in behavior are the result of an individual's response to events (stimuli) that occur in the environment. A response produces a consequence such as defining a word, hitting a ball, or solving a math problem. When a particular Stimulus-Response (S-R) pattern is reinforced (rewarded), the individual is conditioned to respond. The distinctive characteristic of operant conditioning relative to previous forms of behaviorism (e.g., Thorndike, Hull) is that the organism can emit responses instead of only eliciting response due to an external stimulus.

Reinforcement is the key element in Skinner's S-R theory. A reinforcer is anything that strengthens the desired response. It could be verbal praise, a good grade or a feeling of increased accomplishment or satisfaction. The theory also covers negative reinforcers -- any stimulus that results in the increased frequency of a response when it is withdrawn (different from adversive stimuli -- punishment -- which result in reduced responses). A great deal of attention was given to schedules of reinforcement (e.g. interval versus ratio) and their effects on establishing and maintaining behavior.

One of the distinctive aspects of Skinner's theory is that it attempted to provide behavioral explanations for a broad range of cognitive phenomena. For example, Skinner explained drive (motivation) in terms of deprivation and reinforcement schedules. Skinner (1957) tried to account for verbal learning and language within the operant conditioning paradigm, although this effort was strongly rejected by linguists and psycholinguists. Skinner (1971) deals with the issue of free will and social control.


1. Behavior that is positively reinforced will reoccur; intermittent reinforcement is particularly effective
2. Information should be presented in small amounts so that responses can be reinforced
3. Reinforcements will generalize across similar stimuli ("stimulus generalization") producing secondary conditioning

Operant conditio
ning has been widely applied in clinical settings (i.e., behavior modification) as well as teaching (i.e., classroom management) and instructional development (e.g., programmed instruction). Parenthetically, it should be noted that Skinner rejected the idea of theories of learning (see Skinner, 1950).
An everyday illustration of operant conditioning involves training your dog to "shake" on command. Using the operant conditioning technique of shaping, you speak the command to "shake" (the discriminative stimulus) and then wait until your dog moves one of his forepaws a bit (operant response). Following this behavior, you give your dog a tasty treat (positive reinforcer). After demanding ever closer approximations to shaking your hand, your dog finally comes to perform the desired response to the verbal command "shake."

Applications of Operant Conditioning to Education:

Our knowledge about operant conditioning has greatly influenced educational practices. Children at all ages exhibit behavior. Teachers and parents are, by definition, behavior modifiers (if a child is behaviorally the same at the end of the academic year, you will not have done your job as a teacher; children are supposed to learn (i.e., produce relatively permanent change in behavior or behavior potential) as a result of the experiences they have in the school / classroom setting.

Behavioral studies in classroom settings have clearly established ways to organize and arrange the physical classroom to facilitate both academic and social behavior. Instruction itself has also been the focus of numerous studies, and has resulted in a variety of teaching models for educators at all levels. Programmed instruction is only one such model. Programmed instruction requires that learning be done in small steps, with the learner being an active participant (rather than passive), and that immediate corrective feedback is provided at each step.

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