Learning
description
Transcript of Learning
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Karen Siyuan Chen
Learning
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Stimulus Any event or object in the environment to which an organism
responds
Reflex An involuntary response to a stimulus
Eye blink to a puff of air
Conditioned reflex A learned involuntary response elicited by an
unconditioned stimulusSalivate at the sound of rattling
Basic concepts
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Unconditioned stimulus (UCS) Stimulus that elicits a specific unconditioned response without
learningFoodLoud noiseLight in eyePuff of air in eye
Unconditioned response (UCR) Response that is elicited by an unconditioned stimulus without prior
learningSalivationStartleContraction of pupil to lightEye blink response
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Conditioned stimulus (CS)Neutral stimulus that, after repeated pairing
with an UCS, becomes associated with it and elicits a CRThe tone which caused the salivation
Conditioned response (CR)Learned response that comes to be elicited by
a CS as a result of its repeated pairing with an UCSThe salivation which was produced by the tone
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Pavlov’s Classical Conditioning Studies
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Emotional Conditioning
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Fear can be produced and also can be generalized.
Pay attention to horror movies or ghost stories.
Generalization
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Opposite to generalization, which means that it only response to the original conditioned stimulus, but not to similar stimuli.
Discrimination
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Extinction and Recovery
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Classical Conditioning in Daily LifeSmell and taste are closely associated
because the smell of a particular food is a signal for its taste and the physical sensation associated with eating it.
You can imagine how the fresh bread smells, tastes, and its texture by viewing the picture.
What happens when you smell food? Stomach rumbles due to digestive processes
that typically follow the smell and taste of food
Pancreas responds to counteract conditioned rise in blood sugar after a sweet taste on the tongue
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Classical Conditioning in Daily Life Dental visits
Sound of the drills and suction Smell of the office Sight of the chair and light
Drug use The CS associated with drug use lead individuals to seek out those
substances Counselors urge recovering addicts to avoid any cues (people, places,
and things) Taste aversion
Intense dislike and/or avoidance of a particular food that has been associated with nausea or discomfort
Chemotherapy Chemotherapy treatments can result in a conditioned taste aversion Providing a “scapegoat” target can help patients maintain a proper diet
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Operant Conditioning
satisfying consequences
Thorndike’s puzzle box
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I learned and used less time to escape!
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A type of learning in which the consequences of behavior are manipulated in order to: Increase or decrease the frequency
of a response Shape an entirely new response
Operant Voluntary behavior that accidentally
brings about a consequence
Reinforcer Anything that:
Follows a response and strengthens it Increases the probability that it will
occur
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Generalization The tendency to make the learned response to a stimulus
similar to that for which the response was originally reinforced A pigeon trained to peck a yellow disk will peck similarly-
colored disksThe less similar the color the lower the rate of pecking will
be
Discriminative stimulus A stimulus that signals whether a certain response or behavior
is likely to be rewarded, ignored, or punished Children misbehave with a grandparent because the
discriminative stimuli (parents) are not present
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Successive Approximations A series of gradual steps, each more similar to the final desired
response than the one before Reward disruptive children for very short periods of good
behavior, then expecting them to gradually work for longer and longer periods
Extinction The weakening and eventual disappearance of the conditioned
response as a result of withheld reinforcement Shaking a vending machine that fails to deliver soda or candy
before giving up and walking away
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Skinner’s box
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I want to get my food ball, so press!
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Comparing of conditioning
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Positive reinforcementAny pleasant or desirable consequence that:
Follows a responseIncreases the probability that the response will be
repeated
Roughly the same as a rewardYou smile as you walk down the streetPeople smile back at you and say nice thingsYou want to smile at everyone
Reinforcement
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Negative reinforcementTermination of an unpleasant condition after a
response Increases the probability that the response will
be repeated
Turning on air conditioning to avoid the heat
Tie your seatbelt and stop the bee-noise
Heroin addicts will do almost anything to get another fix and avoid the pains of withdrawal
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Primary Reinforcer A reinforcer that fulfills a basic physical need for
survival and does not depend on learning FoodWater Sleep
Secondary Reinforcer Acquired or learned through association with other
reinforcersMoneyPraiseApplause
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Fixed-Ratio Seller will get bonus when they reach the goal
Variable-RatioGambling
Fixed-Interval Your monthly payroll
Variable-IntervalQuiz in class
Schedules of Reinforcement
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Four types of reinforcement schedules
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The removal of a pleasant stimulus or the application of an unpleasant stimulus, thereby lowering the probability of a response
Can you tell me some examples of punishment in harry potter movies?
Punishment
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Timing Don’t kick the dog today for what it did yesterday --- it won’t connect the punishment
with the misdeed. If delay is necessary, the punishment should remind them of the incident and explain why
it was inappropriate.
Intensity Unnecessarily severe punishment leads to adverse side effects. Purpose of punishment is NOT to vent anger but to modify behavior. If too mild, it will have no effect. Gradually increasing the intensity of the punishment causes the perpetrator to adapt and
the unwanted behavior will persist. To suppress a behavior, the punishment must be more punishing than the misbehavior is
rewarding. A $200 ticket is more likely to suppress speeding than a $2 ticket.
Consistency Parents can not ignore misbehavior one day and punish the same act the next day. Both parents should react to the same misbehavior in the same way. An undesired response will be suppressed more effectively when the probability of
punishment is high. Most people will not speed when a police car is in the rear-view mirror.
Making Punishment Effective
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How to modify behavior?
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Negative reinforcement VS punishment
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Best effect: immediate reinforcement
The longer it delays, the lower they response
Effect of a delay in reinforcement
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Tolman’s Latent learning
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Get rewarded, get motivated!
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Learned Helplessness
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Observational Learning
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Did you teach your pet to go to toilet?
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Lose weightComplete homework on timeDo not waste moneyNot getting angry easily Make good use your spare timeAttend to community serviceGo to church every SundaysGet up regularly in school daysDo exercise in Gym
How will you train yourself in life?