ch 7 learning
TRANSCRIPT
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Section 1: Learning
Meghan Fraley, PhD
Theories and Principles of Learning and Behavior
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Review
What were your independent and dependent variables?
Questions & Insights from Yesterday?
Discuss: Would this be an experiment you would enjoy conducting? Why or why not?
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Learning Autobiography
Difficulties
Joys
Passions
Future
How did you learn?
Are you a self-motivated learner?
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Learning Concepts to Know
Concepts
Habituation
Classical Conditioning
Instrumental Conditioning
Observational Learning
Varieties of Learning
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Theories of Learning
LearningClassical
Conditioning
Operant Conditioning
Social Learning Theory
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Learning Theorists
P
• Pavlov: Classical Conditioning; Salivating Dogs (1901; 1927)
W• Watson: Behaviorism founder, Little Albert (1913;
1920s)
T• Thorndike: Law of Effect; Cats Puzzle Box (1898)
S• Skinner: Operant Conditioning; Pigeons (1938;
1953)
Pavlov, Classical Conditioning; Thorndike & Skinner, Operant Conditioning
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The BehavioristsPavlov, Watson, Thorndike, Skinner
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CLASSICAL CONDITIONING
We learn new things when they are connected or paired.
• Respondent conditioning (i.e. involuntary)
• Pavlov and Watson
• Reflexes: stimulus-response links
• Unconditioned reflex:Unconditioned stimulus evokes unconditioned response (US UR); inborn
• Conditioned reflex: Conditioned stimulus and a conditioned response (CS CR); learned
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Altoid?
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Pavlov: Reflexes and Dogs
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Pavlov and Classical Conditioning Essentials
PAIRING!
The CS might precede the US½ Second and Overlapping is Best!
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Pavlov’s Dogs…
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Unconditioned Stimulus and Response
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Methods of Classical Conditioning1. Delay Conditioning (Standard Pairing): CS precedes US and overlaps
2. Trace Conditioning: CS precedes Us with short break
3. Temporal Conditioning: Time is the CS. US is presented at a time interval
4. Simultaneous Conditioning: NS and US completely overlap
5. Backward Conditioning: US precedes NS
True conditioning only occurs when the CS is presented before the US
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Key Concepts of Classical Conditioning
1. Stimulus Generalization
2. Higher Order Conditioning
3. Classical Extinction
4. Spontaneous Recovery
5. Stimulus Discrimination
6. Pseudoconditioning
7. Habituation
S R
A stimulus is
presented
in order to get
a response:
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Stimulus Generalization
Watson and Little Albert: Little Albert was afraid of bunnies!
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Stimulus Generalization
Occurs when the stimuli similar to the CS also elicits the CR
Strength of the CR diminishes as the similarity between the stimuli and the original CS decreases
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Higher-Order Conditioning
Two Steps
• 1) Ordinary classical conditioning
• 2) Original CS is treated like a US and paired with neutral, so neutral begins to also stimulate CR.
i.e. opening the cabinet door to get the food out for the kitties
2 order works, 3rd doesn’t
Bio-preparedism: Why animals will respond to the CS prior to the US
CR elicited
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Higher Order Conditioning
Deliberate process where CS are paired with NS up to three levels.
An animal might first learn to associate a bell with food (first-order conditioning), but then learn to associate a light with the bell (second-order conditioning). Honeybees show second-order conditioning during proboscis extension reflexconditioning.[1]
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Is Fear a Conditioned Response?Watson and Baby Albert
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Discuss: Phobias
Based on classical conditioning, why do objects become more fearful over time?
Does anyone have a phobia that
How does this discussion map on to the research projects?
What might be problems with our study?
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Classical Extinction
Unlearning a conditioned response. Repeatedly presenting conditioned stimulus with unconditioned stimulus
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Extinction
CS ALONE = EXTINCTION
Once the conditioned response has been established, it will eventually disappear when the CS is repeatedly presented without the US.
Ahhh… but the behavior is inhibited, not eliminated
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Inhibited Extinction
You still remember the former pairing… which sets the stage for spontaneous recovery.
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Spontaneous Recovery
Durin extinction trials, after a brief rest period, the conditioned response often briefly reappears.
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Stimulus DiscriminationLearning to discriminate between two similar neutral stimuli when only one is paired with the unconditioned stimulus (US)
Experimental Neurosis: Making stimulus discrimination too difficult may cause agitation. Later, if returned to original mastered discrimination, dog is no longer able to discriminate.
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Blocking and Overshadowing
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Pseudoconditioning
Accidental learning caused by inadvertant pairing or heightenedarousal.
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Habituation
Becoming accustomed to an unconditioned stimulus (US). It no longer evokes the unconditioned response (UR).
• Only related to unconditioned stimuli/response
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Wolpe: Reciprocal Inhibition
Although Wolpe originally developed systematic desenstiziation as an application of reciprocal inhibition.
Research using the “dismantling strategy” found that repeated exposure to the CS without the US (extinction) is responsible for th reduction of the anxiety response
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SUD Scale
Different levels of anxiety
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Aversive Counterconditioning
Aversive counterconditioning (aversion therapy) uses counterconditioning to eliminate undesirable self-reinforcing behaviors such as drug use or a paraphilia
Imaginary Aversive Conditioning: Covert sensitization
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In Vivo Exposure with Response Prevention (Extinction)
Minimum amount of time is 45 minutes for flooding
Based on the assumption that an anxiety arousing object or situation is a CS and that repeated exposure to the CS will result in extinction of the CR
• Expose individual to anxiety-arousing object or situation while prohibiting him/her from making the usual avoidance response
Applications of this technique include flooding and graduated (graded exposure)
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OPERANT CONDITIONING
We learn as a result of reward and punishment. Operant conditioning explains Voluntary behavior
AKA: Instrumental Conditioning
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Thorndike’s Law of Effect
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Thorndike: Law of Effect
How is a new skill learned?
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Skinner & Operant Conditioning
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How Pigeons Learn Self Control
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Reinforcement and Punishment
Positive Reinforcement = Reward
Negative Reinforcement = Relief
Positive Punishment = Pain
Negative Punishment = Loss
Positive = AddedNegative = Taken Away
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Schedules of Reinforcement
1. Continuous- Satiation
- Thinning
2. Intermittent- Fixed Interval (FI)
- Variable Interval (VI)
- Fixed Ratio (FR)
- Variable Ratio (VR)
Satiation
Thinning Graduate!
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Continuous Reinforcement
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Intermittent: Fixed-Ratio
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Intermittent: Variable-Ratio
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Combined Fixed-Ratio Schedules
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Rates and Patterns of Responding
Rates during Acquisition
Variable and Ratio greatest operant strength
VR, FR, VI, FI
Resistance to Extinction
Variable and Ration most resistant to extinction
VR, FR, VI, FI
Pattern of Responding
Fixed schedules result in pauses after reinforcement
Fixed graphs appear scalloped
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Reinforcement Schedules Graph
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Matching Law
When concurrent schedules of reinforcement are used, subject will match the relative frequency of reinforcement obtained
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Key Concepts of Operant Conditioning
Operant Extinction (response burst)
Superstitious Behavior (accidental/non-contigent reinforcement)
Discrimination Learning (Discriminate stimulus and S Delta)
Stimulus Generalization
Response Generalization
Prompting (cueing subject, fading = reducing prompting)
Shaping by Successive Approximations (
Chaining (stringing behaviors to accomplish goal)
Premack Principle (Pairing high frequency and low frequency)
Behavioral Contrast (increasing reinforced behavior of previously equally reinforced)
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Operant Extinction
Ceasing to reinforce behavior that has previously been reinforced.
Behavior will diminish/extinguish
Use of extinction involves removing reinforcement from a previously reinforced behavior in order to eliminate that behavior
No longer reinforcing something that was once reinforced
Thin the reinforcement ratio
You will get an extinction burst!
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Escape versus Avoidance Conditioning
Escape and avoidance conditioning are both applications of negative reinforcement, but avoidance conditioning combines negative reinforcement with classical conditioning
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Differential Reinforcement
ASK THE PERSON NOT TO DO ONE THING
Combines extinction with positive reinforcement for other (alternative) behaviors
Just asked NOT to do one thing
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Response Burst & Superstitious Behavior
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Discrimination LearningIn each of these cases which of the cards on the desk is the discriminative stimulus (SD) and which is the stimulus delta (SΔ)?
Under stimulus control, example of two-factor learning
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Stimulus and Response Generalization
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Prompting
Cueing subject, Fading = reducing prompting
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Operant Postiive Reinforcement
Premack Principle:
• Do less likely behavior, and reward yourself with more likely behavior. Something you love.
Shaping:
• Shaping involves reinforcing successive approximations to the desired behavior
Chaining:
• Chaining is used to establish complex behaviors that consist of responses that must be linked together to form a “behavior change”
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Shaping by Successive Approximations
SIMPLE: ONE BEHAVIOR IS SHAPING
Teaching an autistic child to smile
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ChainingStringing behaviors to accomplish goal
Multiple behaviors is chaining.
• Teaching a rat to put a basketball through a hoop
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Premack Principle
Premack's principle, or the relativity theory of reinforcement, states that more probable behaviors will reinforce less probable behaviors.
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Behavioral Contrast
Behavioral contrast refers to a change in the strength of one response that occurs when the rate of reward of a second response, or of the first response under different conditions, is changed.
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Who’s Who?Experiments of Pavlov, Watson, Skinner, & Thorndike
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Name that Learning TheoryOperant or Classical Conditioning?
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Social Learning Theory
Reciprocal Determinism:Interactive triad of person/behavior/environment regulate behavior.
Bandura posited that observational learning requires four steps:
1. Attention
2. Retention
3. Production
4. Motivation
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The Bobo doll experiment
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Social Learning Theory: Factors Influencing StrengthResearch indicates that the following factors influence the strength of learning from models:
1. How much power the model seems to have
2. How capable the model seems to be
3. How nurturing (caring) the model seems to be
4. How similar the learner perceives self and model
5. How many models the learner observes
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Social Learning Theory: Interrelated Identification Processes
Four interrelated processes establish and strengthen identification with the model:
1. Children want to be like the model
2. Children believe they are like the model
3. Children experience emotions like those the model is feeling.
4. Children act like the model.
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Discuss: Where has social learning impacted you?
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Learning Theory Applied
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What motivates us to learn?
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Reflect/Journal: Your Learning Process
Do you enjoy learning? Why or why not?
Do you feel confident in your ability to learn?
What is your favorite thing to learn about? Why?
What have been bad experiences you have had with learning?
What is the point of going to school for you? Why is it important to you to be here at Skyline learning?
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Teaching
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Learning Theory Overview
1. Classical Conditioning
• -Pavlov, Reflexes
2. Operant Conditioning
• -Reinforcement/Punishment
3. Social Learning Theory
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Are these experiments ethical?What ever happened to Baby Albert?