Download UNIT VI Notes

Unit 6, LEARNING notes, pp. 215-253
Updated for 2011; goes with Ch. 8 in 2007 book)
Adaptability: capacity to learn new behaviors that help us cope with changing
circumstances
Learning: a relatively permanent change in behavior based on experience
Habituation: an organism’s decreasing response to a stimulus with repeated exposure to
it.
Associative learning: forming an association between cause and effect
Example: associating the sound of thunder with the sight of lightning
Conditioning: the process of learning associations
Operant conditioning: learning to associate a response with its consequence
Observational learning: learning from the examples of others
Classical conditioning: learning to associate to stimuli to anticipate events
Behaviorism: Watson’s view that psychology should be an objective science based on
observable behavior
I. Classical conditioning
What is classical conditioning and how did Pavlov’s work influence
behaviorism?
IVAN PAVLOV, JOHN WATSON page 218
Developed by Ivan Pavlov using dog salivation experiments
Stimuli is associated with an involuntary response
Respondent behavior: an automatic response to certain stimuli
Unconditioned response (UCR or UR) the normal response; in Pavlov’s experiment it
was the salivation of the dog.
Unconditioned stimulus (UCS or US) the stimulus that triggers a normal response
Conditioned response (CR) the response that is learned; in Pavlov’s exp. it was
salivation to a metronome or turning fork and other sounds.
Note: the UR and CR are almost always the same.
Conditioned stimulus (CS) a neutral stimulus that triggers a learned response; in
Pavlov’s experiment it was the sound
The US should precede the CS by about ½ second.
Acquisition, 220
What are the five major processes in CC?
There are five major processes with classical conditioning
1. Acquisition: the initial formation of the association between the CS and the CR
Higher order conditioning: the CS in one experience is paired with a new NS,
creating a second CS. Ex: an animal that has learned a tone produces food may learn
that a light signals the presentation of the tone.
2. Extinction: if the UCS is not presented, after a few times the organism loses
receptivity to the CS
3. Spontaneous recovery: however, if the UCS is presented again with the CS, the
organism begins to respond again
4. Generalization: the tendency to respond similarly to similar stimuli;
5. Discrimination: the ability to distinguish between different stimuli
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Updating Pavlov, 223
Do cognitive processes and biological constraints affect classical conditioning?
Behaviorist learning doesn’t allow us to generalize from one response to another, nor
from one species to another
Cognitive processes
1. Rescorla and Wagner (1972): animals learn to “expect” an
unconditioned stimulus; this shows cognition at work: the animal learns
the predictability of a second associated event after the first
2. Conditioning an alcoholic with a nauseating drink might not work because
they are “aware” of what causes the nausea---the drink, not alcohol
Martin Seligman found that dogs given repeated shocks with no opportunity to avoid
them developed a passive resignation called learned helplessness.
Some dogs just never gave up. He developed the idea of learned optimism and now
teaches people to be more optimistic and less helpless.
Biological predispositions
Garcia and Koelling:
1. Animals can learn to avoid a drink that will make them sick, but not when
it’s announced by a noise; so Pavlov was wrong in claiming that any
stimulus could serve as a conditioned stimulus.
2. We are biologically prepared to learn certain associations and not others:
we learn to fear snakes, but not flowers
3. Taste aversions result from biology. The smell and taste of a nauseating
food become the CS for sickness.
4. Secondary disgust: an aversion that reminds a person of something that is
considered disgusting in its own right. Ex. You won’t eat a piece of
chocolate formed like dog feces.
The biopsychosocial influences on learning (see fig. 6.9, p. 225): genetic predispositions,
previous experiences, predictability of associations, culturally learned preferences, and
motivations all influence learning.
Many phobias are learned through classical conditioning. Systematic desensitization
can also unlearn these fears. (see pp. 611-612)
Pavlov’s legacy, 226
Virtually all organisms learn by classical conditioning.
Pavlov showed how the process can be studied objectively.
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Practical applications
What have been some applications of classical conditioning?
1. Treating drug addiction
2. Treating emotional illness
5. Increasing the immune system’s responsiveness (Robert Ader’s rat
experiment: rats who liked saccharine inadvertently were conditioned to
lower their immune system when the sweet substance was paired with a
chemical that made them nauseous)
6. Pavlov’s worked paved the way for John Watson’s Little Albert
Study:
He conditioned Albert to fear (CR) a white rat (NS) when the rat’s presence
was paired with the sound of a loud noise (UCS). It only took seven
pairings.
After five days Albert became afraid of other fury white animals
(generalization).
Watson showed how emotions could be conditioned. An opposite effect to
the Albert experiment can be created: you can learn not to fear things.
Watson later worked in advertising and invented the concept of the “coffee
break”.
II. Operant conditioning
BF SKINNER page 228
What is operant conditioning, and how does it differ from classical conditioning?
Developed by B. F. Skinner where subjects voluntarily respond a certain way
depending on the consequences (reward or punishment)
Respondent behavior: it occurs as an automatic response to some stimulus
Operant behavior: the behavior that acts upon a situation and produces consequences
Ex: eating in your parent’s living makes them mad; your eating behavior may change
depending on the kind of consequences you want (yelling or not) the situation to have
Skinner’s experiments, 229
Law of effect: EL Thordinke’s idea that behavior that is rewarded is more likely to
recur (one of Psychology’s few laws)
Operant chamber: Skinner box used to reward animal behavior; this behavioral
technology revealed the principles of behavior control
Shaping: reinforcers guide behavior; gradually rewarding behavior as it approaches
the desired target; important because organisms rarely perform the desired behavior at
first.
Successive approximations: rewarding responses that are closer to the target
behavior
Discriminative stimulus: it elicits a response after association with reinforcement;
these are used to help animals form concepts
Types of Reinforcers, 230
What are the basic types of reinforcers?
Reinforcers: anything that increases the chance of a behavior occurring again
1. Positive: things the organism desires
Ex: rewards like appraisal, money, and food
2. Negative: the removal (-) of aversive events
Freeing someone from prison
Taking a medicine to relieve a cold
3. Primary things that satisfy inborn biological needs
Ex: food, water, warmth
4. Secondary (also called “conditioned”) learned things that are strengthened by
association with primary reinforcers
Ex: money that can be used to buy the primary reinforcer, food
Ex: praise, high grades, smiles which can lead to the primary emotion, happiness
Immediate and delayed page 231
Unlike rats, humans do respond to delayed reinforcement
Four year olds have been shown to delay reinforcement; example: Walter
Mischel’s marshmallow experiment)
But drug users succumb to immediate gratification; the later ill effects often not
enough to prevent addiction
Teens fall to immediate gratification of sex over safe or saved sex
Schedules of reinforcement pages 232-233
How do different reinforcement schedules affect behavior?
a. Continuous
A quick method of learning in which the desired behavior is reinforced every time
when reinforcement stops extinction can quickly happen; a teacher awarding points for
every assignment is an example.
b. Partial reinforcing a behavior parts of the time; the acquisition is slower but more
resistant to change
c. Fixed ratio reinforcement after a fixed number of response
Ex: getting candy after washing the floor every 3 times
d. Variable ratio
Ex: getting candy after the third floor washing, then the 2nd, then the 5th
Ratio schedules produce high rates of responding; reinforcers increase as the
numbers of responses increase.
e. Fixed interval reinforcement after a fixed amount of time
Ex: getting candy three hours after every time the floor is washed
f. Variable interval reinforcement after an unpredictable amount of time
Ex: getting candy two hours after the floor is washed, then 3, then 5
Variable schedules produce more consistent responding.
Punishment, 234
How does punishment affect behavior?
The opposite of reinforcement: the goal is to decrease behavior, not to increase it
John Darley: swift and sure is the most effective punishment
Positive punishment: administer something the subject doesn’t like
Example: spanking; parking ticket
Negative punishment withdrawal of something desirable
Example: timeout (the child can get out of the time out if they agree to comply with
parent requests); revoking privileges
Punishment pros and cons
1. successfully stops behavior
2. drawback: the behavior is only suppressed, arising later when appropriate
3. punishment increases aggression because it models aggression as a way to
cope
4. Also teaches discrimination
5. Can teach fear
6. If using it pair with reinforcement; notice the individual doing what you
want and reward them (like the Norski Nod!)
Extending Skinner page 235
Do cognitive processes and biological constraints affect operant conditioning?
Just before his death, in his last speech, Skinner maintained that behavior is the key in
psychology and not cognition. But, research has shown cognitive processes are much
more important, even in conditioning.
Latent learning demonstrating knowledge only when it is needed; Tolman and
Honzik did the research.
Ex. mice that explored a maze only demonstrate that they know the maze well by directly
going to the food placed the previous time
Cognitive map a mental image of your surroundings; mice developed this in
Tolman’s studies; he showed there is more to learning than just association; cognition
is also at work.
Insight learning, 236
The solution suddenly appears in the mind.
Intrinsic motivation
236
Performing an activity for its own sake
Edward Deci showed that rewards can undermine motivation: if you already like doing
something and are then rewarded for the activity, you may lose interest and only perform
it for the reward.
Extrinsic motivation behaving in a certain way to receive external rewards
Overjustification effect giving a reward for something the organism already likes to
do; here, the extrinsic motivator overrides intrinsic interest in the task
This concept is related to cognitive dissonance (Leon Festinger’s concept on page
648): in change the difference between an attitude and action people will often
change their attitude to support their action.
This is unfavorable because the organism will lose interest in the activity
Ex. Paying someone to do a puzzle they already like doing
Some researchers claim rewards can raise performance and spark creativity. Don’t
use them as bribes or to control, but to signal a good performance.
Biological predispositions, 237
Skinner’s students Keller Breland and Marian Breland studied animals. They can be
“taught” to do certain human behaviors using operant conditioning but then revert to the
normal ways; this is known as “instinctive drift” with trained animals acting naturally
even though trained.
Superstitions are behaviors that are accidentally reinforced.
Practical applications of Operant Conditioning: Skinner’s legacy. Page 238
1. Improving Student performance: computers replace teachers to properly reinforce
learned behavior
2.Improving Work productivity
Make reinforcement immediate
Well-defined goals that are achievable
3.Helping shape child behaviors
Reinforce good behavior
Ignore whining
Explain misbehaviors and give time outs
4.Improving athletic skills
5 Self-improvement: specify goals, monitor, reinforce, reduce rewards. Neil
Miller’s concept of biofeedback can be used here. This is a cognitive strategy
to monitoring of changes in physiological responses.
Contrasting Classical and Operant Conditioning
See table 6.4, page 241
III. Learning by observation
ALBERT BANDURA page 242
What is observational learning and how is it enabled by mirror neurons?
Observational learning---also called social learning--- researched by Albert Bandura
in the 1960s to the present.
Modeling watching specific behaviors of others and imitating them; we tend to mimic
models who are similar to us.
His famous experiment was the Bobo Doll experiment. Children acted violently after
watching television programming which depicts violent characters that acted as models.
Self-efficacy and learning
1. Albert Bandura: Your belief about your ability to learn to make changes in your life.
2. People high in self efficacy, have more control over their lives.
3. They take information from the environment and use it to improve their lives
4. Summary: If you believe you can do learn to do something, you are more likely to be
able to achieve it.
Mirrors in the brain, 243
Mirror neurons frontal lobe neurons; they fire when performing certain actions or
watching others; allows for imitation, language learning and empathy; discovery of
Giacomo Rizzolatti.
We have a mirror neuron system that supports empathy (emotional understanding of
others) and imitation.
These neurons help infer the mental states of other and give rise to a theory of mind.
People with autism lack this ability (see 422-423)
Mirror neurons underlie our social behavior.
Bandura’s experiments page 244
Bandura was looking at vicarious learning: when you see someone else rewarded for
emitting a behavior.
When the adult model was reinforced for aggressive behavior, the children who saw this
in one version of the Bobo Doll experiment were far more likely to act aggressively
themselves. This was in comparison to other groups of kids who saw the adult punished
in another ending, or saw no consequence in this a third version. The effects were long
lasting.
Applications
Behavior modeling used by businesses to train employees
Positive Observational learning
Prosocial behaviors actions that are beneficial, constructive, and not violent.
These behaviors can prompts similar behaviors in others thus, prosocial.
Research experiments show that children often do what their models (usually parents) do.
Hypocritical parents: saying one thing and doing another. Their children will say what
they say and do what they do.
Antisocial effects, 247
Anti-social models can have anti-social effects
Abusive parents might have aggressive children
Television and observational learning
George Gerbner’s studies: television does not reflect the real world
Correlational studies link violence viewing with violent behavior (Craig Anderson’s
research); but correlation does not mean causation.
Leonard Eron’s studies: the more hours children watch, the more they are at risk for
aggression and crime
Myers asserts that he consensus is that violence on TV leads to aggressive behavior
among children and teens. But this study is from 1982. The Supreme Court, in 2011,
found a much more mixed picture in rejecting this claim.
Myers cites two factors:
One factor is imitation: kids copy what they see on TV.
Exposure to violence desensitizes the viewer: watching cruelty promotes indifference
Key terms: 251-252 (see study guide)
AP Quiz: 252-253