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Published on: June 2, 2014
Matching with a key-peck response in concurrent negative reinforcement schedules
Journal of the Experimental Analysis of Behavior
|September 1, 1978
Summary
Pigeons matched their behavior to the availability of shock-free time, demonstrating choice behavior under negative reinforcement. These findings suggest common principles govern both positive and negative reinforcement schedules.
Area of Science:
- Behavioral psychology
- Animal behavior studies
- Operant conditioning
Background:
- Pigeons were exposed to shock under a variable-time schedule.
- Key pecks could provide one minute of shock-free time.
- This setup involved concurrent variable-interval schedules.
Purpose of the Study:
- To investigate pigeons' choice behavior under negative reinforcement.
- To determine if pigeons match their responses to the frequency of shock-free periods.
- To compare choice behavior under negative versus positive reinforcement.
Main Methods:
- Pigeons' responses on two keys were studied.
- The relative frequency of shock-free periods was manipulated.
- Response rates and time allocation were measured.
Main Results:
- Pigeons matched relative response rates to the frequency of shock-free periods.
- Pigeons allocated their time in proportion to shock-free period availability.
- Linear regression showed over 95% variance explained for both measures.
Conclusions:
- Pigeons' behavior under negative reinforcement follows matching laws.
- Reinforcement can be viewed as a transition to a better situation.
- Common behavioral principles likely govern both positive and negative reinforcement.
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Reinforcement Schedules
Positive reinforcement is a powerful method for teaching new behaviors to both animals and humans. B.F. Skinner demonstrated this with his experiments using rats in a Skinner box. When a rat pressed a lever, it received a food pellet. This immediate reward encouraged the rat to repeat the behavior. This method, where a reward follows every instance of the behavior, is known as continuous reinforcement. It is highly effective for establishing new behaviors quickly.
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Reinforcement
Positive and negative reinforcement are key concepts in operant conditioning, a learning process where the consequences of a behavior affect the likelihood of that behavior being repeated.
Positive reinforcement occurs when a behavior is followed by the presentation of a rewarding stimulus, increasing the frequency of that behavior. For example:
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Timing and Consequences on Behavior
In operant conditioning, the timing of reinforcement is crucial. For animals like rats and cats, immediate reinforcement (within a few seconds) is much more effective than delayed reinforcement. For example, a food reward for a rat needs to follow within 30 seconds of pressing a bar to be effective.
Humans, however, can respond to delayed reinforcers. We often make decisions between immediate small rewards and delayed larger rewards. This ability to delay gratification is a significant factor...
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Punishment
Negative reinforcement and punishment are often confused but serve distinct functions in behavior modification. Reinforcement, whether positive or negative, increases the likelihood of a desired behavior, while punishment decreases it.
Punishment can be positive or negative. Positive punishment involves adding an undesirable stimulus, such as scolding, to decrease a behavior. Negative punishment involves removing a desirable stimulus, such as taking away a favorite toy, to decrease behavior.
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Operant Conditioning
Operant conditioning, a key concept in behavioral psychology, involves using reinforcement and punishment to alter the likelihood of a behavior being repeated. B.F. introduced this type of conditioning. Skinner focused on voluntary behaviors and the consequences that follow them, influencing whether these behaviors will be strengthened or diminished.
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Operant Conditioning Intervention
Operant conditioning serves as a foundational principle in therapeutic interventions aimed at modifying maladaptive behaviors. Central to this approach is the notion that behaviors, both adaptive and maladaptive, are learned through reinforcement. By analyzing the environmental factors that reinforce problematic behaviors, clinicians can design interventions to weaken these reinforcements and replace maladaptive behaviors with healthier alternatives.
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