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Learning
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LEARNING CONCEPTS
• Learning– any relatively permanent change in behavior that
occurs due to experience.
• Conditioning-forming associations between environmental stimuli and responses– Classical Conditioning– Operant Conditioning
• Cognitive learning
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Classical Conditioning
• The process of learning by which a previous neutral stimulus comes to elicit an identical or similar response to one originally elicited by another stimulus as the result of the pairing of the two stimuli.
• Ivan Pavlov was the first to describe and document the form of learning we now call classical conditioning.
• Classical conditioning is also called Pavlovian or respondent conditioning.
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Principles of Classical Conditioning
– Unconditioned stimulus (US)--stimulus eliciting an automatic or reflexive response
– Unconditioned response (UR)--response that is automatically produced
– Neutral Stimulus (NS) stimulus that before conditioning does not produce a particular respomce
– Conditioned stimulus (CS)--an originally neutral stimulus that comes to elicit a conditioned response after being paired with a US
– Conditioned response (CR)--response that is elicited by a CS
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Extinction
When the conditioned stimulus (CS) is
presented repeatedly without the
unconditioned stimulus (US), the
conditioned response (CR) eventually
disappears.
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Spontaneous Recovery
After a response has been extinguished, it may
spontaneously reappear after the passage of
time, with exposure to the conditioned stimulus.
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Higher-order Conditioning
A neutral stimulus (NS) can become a
conditioned stimulus (CS) by being paired with
an already established conditioned stimulus
(CS).
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Stimulus Generalization
After a stimulus becomes a conditioned
stimulus for some response, similar stimuli may
produce the same reaction.
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Reconditioning
Relearning conditioned response after
Extinction.
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Conditioned Emotional Reaction(CER)
Emotional response to a particular stimulus
acquired through classical conditioning.
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Operant Conditioning
Process of learning in which the
manipulation of the consequence of a
response influences the like hood or
probability of the response occurring.
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Thorndike and the Law of Effect
• Thorndike observed that behavior is controlled by its consequences.
• Responses that have satisfying effects are more likely to recur, while those that have unpleasant effects are less likely to recur.
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Radical Behaviorism
• Introduced at the turn of the 20th Century.
• Philosophical position that free will is an illusion or myth and that human and animal behavior is completely determined by environmental and genetic influences.
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Burrhus Frederic (B.F.) Skinner
• Behavior is explainable by looking outside of the individual.
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Reinforcers Always increase the likelihood of a response
• Positive reinforcement– something pleasant is presented
• Negative reinforcement– something unpleasant is removed
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Reinforcers
• Primary reinforcers – satisfy biological needs
• Secondary reinforcers– reinforcing through association with other
(possibly primary) reinforcers
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Schedule of Continuous Reinforcement
• Reinforcing a response each time it occurs.
• Most effective for initial learning.
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Schedule of Partial Reinforcement
• Also known as intermittent schedules.
• Reinforcement occurs only after a certain amount of time has passed or only after a certain number of responses have been made.
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Fixed-Ratio Schedule
• Reinforcement is given after a specific number of correct responses.
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Variable-Ratio Schedule
• Certain number of correct responses needed before reinforce is given varies around some average number.
• Gamblers never know when their lucky number will come.
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Escape and Avoidance Learning
• Escape Learning – Learning of behavior that allows the individual
to escape from an aversive stimulus.
• Avoidance learning– Learning of behavior that allow an organism
to avoid an aversive stimulus.
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Punishment
• Aversive stimulus or removal of reinforcing stimulus after a response occur, which leads to the weakening or suppression of the response
• Punishers– decrease the likelihood of a response
• Positive punishment– something unpleasant occurs
• Negative punishment– something pleasant is removed
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Behavior Modification
• The systematic application of learning principles to strengthen adaptive behavior and weaken maladaptive behavior.
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Token Economy
• Behavior modification technique.
• Uses tokens earned for performing desired behaviors.
• Tokens can be exchanged for positive reinforcers.
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Programmed Instruction
• Complex material is broken into a series of small steps.
• Individual learn at their own pace.
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Computer-Assisted Instruction
• Computer is used to guide student through a series of increasingly difficult questions.