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Chapter 9Principles of Learning
Principles of Learning You walk into a kitchen and smell your favorite food.
- What physically happens to you? - What happens mentally?
What is learning? Learning
- lasting changes in behavior that occur as a result of practice or past experiences - acquiring the ability to do something that you haven’t done before - use an ability in a different way
Not all behavior is learned - reflex
• blinking when a puff of air hits your eye • crawling • changes in voice (adolescent boys)
Classical Conditioning Classical Conditioning
- learning situation in which a certain stimulus brings forth a response that it did not previously evoke - Ivan Pavlov
• studies the salivating of dogs • How did the experiment work?
Classical Conditioning The Experiment
- a dog was placed in an apparatus that would measure the flow of saliva when being presented with food
- a tube was attached to the mouth to measure saliva - powdered meat was placed in the dogs mouth
Classical Conditioning Pavlov’s Dogs
- Unconditioned Response (UCR): Flow of saliva • occurs normally with no learning necessary
- Unconditioned Stimulus (UCS): the meat • normal, unlearned agent for causing salivation
Classical Conditioning What is the natural response to each stimulus listed below? (What happens)
Stimulus -------------------------------------------------------------------Response - a dog sees food ------------------------------> - a baby hears a loud unfamiliar noise ------------------------> - you put your hand on a lit candle ---------------------------> - your teacher yells at you ----------------------------->
Are the responses you wrote conditioned or unconditioned? Why?
Design your own example of an unconditioned stimulus followed by an unconditional response (something you do automatically).
Stimulus: ____________________ Response: _____________________
Classical Conditioning Pavlov’s Dogs
- Next, Pavlov rang a bell just and gave the dog the meat immediately after - Then he sounded the bell without giving the dog the meat
• he found that the dog still salivated even though the dog was not given the meat
- Conditioned Stimulus (CS): sound of the bell • a new stimulus that originally did not cause a response
- Conditioned Response (CR): salivating at the sound of the bell • a similar response to a new stimuli
Classical Conditioning http://www.youtube.com/watch?v=hhqumfpxuzI (Pavlov’s Dogs)
http://www.youtube.com/watch?v=nE8pFWP5QDM (The Office)
Classical Conditioning In the following examples, the unconditioned stimulus is paired repeatedly with
a neutral stimulus. What is the response to the pair stimuli?
Unconditioned Stimulus + Neutral Stimulus = Response
1. a dog sees food a bell rings =2. a baby hears a loud a toy appears =
unfamiliar noise 3. a hand is raised to slap a light flashes =
your face 4. you put your hand on a door slams =
a lit candle 5. You teacher yells at the teacher
you taps a pencil =
Classical Conditioning Are the responses you wrote conditioned or unconditioned? Why?
Design your own example of an unconditioned stimulus that is paired with a neutral stimulus and generate a response.
USC _________________ + NS __________________= R ________________
Classical Conditioning Conditioned Response
- What is the Conditioned Response (CR) to each of the conditioned stimulus (CS)? Conditioned Stimulus Conditioned Response
1. the dog hears a bell ---------------------> 2. a baby gets a toy ------------------------> 3. a light flashes ----------------------------> 4. a door slams -----------------------------> 5. your teacher taps a pencil ----------->
Are the responses you wrote conditioned or unconditioned? Why?
Design your own using your previous example.
HOMEWORK and QUIZ WS: Learning to Learn
WS: Classical Conditioning ExamplesQUIZ TOMORROW!
Classical Conditioning Counter-Conditioning
- conditioning the stimulus to a different response - used to get rid of certain, unwanted behaviors - EX: alcohol - can be given a drug that makes a person nauseous
- criticized for NOT treating the cause, just the symptoms EX: weight loss
Avoidance Conditioning - when an organism is taught to to avoid a stimulus
Classical Conditioning Baby Albert Experiment
http://www.youtube.com/watch?v=9hBfnXACsOI
Classical Conditioning Extinction and Spontaneous Recovery
- extinction: when the learner stops responding to a stimuli • is not always permanent
o EX: War veterans - spontaneous recovery: reappearance of the conditioned response
without reinforcement after a period of extinction
Classical Conditioning Reinforcement
- presenting the UCS immediately after the CS - faster learning
- Intermittent Reinforcement: occasional rather than continuous reinforcement
• EX: Gambler
Classical Conditioning Intermittent Reinforcement Schedules
- ratio schedule: depends on the number of correct responses • 2 types
o fixed ratio: reinforced after a set number of correct responses (every 5th correct response)
o variable ratio: number of responses between reinforcement varies
- interval schedule: reinforcement is determined between responses (TIME)• 2 types
o fixed interval: response is reinforced after a set number of times
o variable interval: time varies throughout the conditioning process
Classical Conditioning Generalizations
- a conditioned response to stimuli similar to the original stimuli EX: different tones to Pavlov’s dogs
Discrimination- tendency to respond to a particular stimulus one way and respond to a similar one another way
EX: the term “Daddy” being applied to a particular person
Operant Conditioning Suppose you want to train your dog. How would you train your dog to sit? or
fetch?
Operant conditioning - strengthening a stimulus-response relationship by following the response with reinforcement
Operant Conditioning Classical Conditioning vs.
Operant Conditioning
stimulus -> reinforcement -> response stimulus -> response -> reinforcement
Reinforcement is given before the Reinforcement followed a correct responseresponse and helps cause the response
Subject is passive and reacts only when a Subject is active and operates on the stimulus is introduced environment
The specific unconditioned stimulus is The specific unconditioned stimulus is unknown unknown
Operant Conditioning Programmed Learning
- an instruction method that uses the operant conditioning techniques of presenting an organism with a stimulus
• organism responds and receives reinforcement for a correct response
Video: Big Bang Theory http://www.youtube.com/watch?v=Mt4N9GSBoMI
Operant ConditioningWS: Operant Conditioning WS: How do we learn?
Video: http://www.youtube.com/watch?v=B8vIbuoktew
Operant Conditioning Shaping Experiment - I need a volunteer to leave the classroom for a minute….
- Shaping • the experimenter rewards an organism each time it makes a response
that is close to the desired response
Reinforcement Positive Reinforcement
- strengthens a response by its presence - operant conditioning relies on reinforcement
Negative Reinforcement - strengthens a response with its absence - a reverse reward
Reinforcement Secondary Reinforcement
- a stimulus that has been associated w/ something that satisfies a need - EX: Money
• to maintain a family, individuals must provide food, clothing, shelter etc.
o Money does not give them these things but they can buy the things with money
Reinforcement Role of Punishment
- Punishment: providing negative stimulus after a behavior has occurred