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Learning

• What is Learning?

– Relatively permanent change in behavior that

results from experience (behaviorist tradition)

– Can there be learning that does not result in a

change in behavior?

• Types of Learning

– Associative Learning (simple, passive, external)

– Cognitive Learning (complex, strategic, internal)

Associative Learning

• Classical Conditioning – associating two

stimuli

• Operant Conditioning – associating a

behavior and its consequences

Classical Conditioning

• Pavlov’s serendipitous discovery

• Associating 2 stimuli

– The first stimulus is “neutral” – does not

produce any response

– The second stimulus produces a reflex

(unconditioned) response

• After the 2 stimuli become associated, both

will produce the unconditioned response

Pavlovian Classical Conditioning

Before Conditioning

UCS UCR



Neutral Stimulus No Response



During Conditioning

CS UCS UCR



After Conditioning

CS CR

Pavlovian Classical Conditioning

Before Conditioning

Food (UCS) Salivation (UCR)



Tone (NS) No Salivation



During Conditioning

Tone (CS) Food (UCS) Salivation (UCR)



After Conditioning

Tone (CS) Salivation (CR)

Classical Conditioning to Cure Bed-Wetting



Before Conditioning

Alarm (UCS) Wake up (UCR)



Full Bladder (NS) No waking up



During Conditioning

Full B. (CS) Alarm (UCS) Wake up (UCR)



After Conditioning

Full Bladder (CS) Wake up (CR)

Further Concepts that Apply to

Classical Conditioning

• Generalization: CR is given to stimuli that are

similar to the CS

• Discrimination: CR not given to stimuli that are

dissimilar to the CS

• Extinction: If the CS is presented repeatedly

without being followed by the UCS, the CR will

diminish or cease

• Spontaneous Recovery: Following extinction, the

CR will spontaneously re-appear after a delay

Classical Conditioning as Simple

Associative Learning

• Temporal Contiguity was thought to be

sufficient – the CS simply needs to occur

immediately prior to the UCS for

conditioning to take place

• Equipotentiality: any two stimuli could be

associated through conditioning

Equipotentiality Falsified

• Some stimuli are easier to associate than

others

• Taste Aversion – only foods become

associated with illness, not other stimuli

– Garcia & Koelling, 1966 – the “Sweet, bright,

noisy water study”

Garcia & Koelling, 1966

• CS = flavor, light, and click (sweet, bright, noisy water)

• UCS: 2 conditions

– Group 1: UCS = illness (from X-rays)

– Group 2: UCS = shock

• CR = avoidance (not drinking the water)

• After conditioning, tested which features of

the CS were associated with each UCS

Garcia & Koelling: Results

• Both Groups:

CS (sweet, bright, noisy)  CR (avoidance)

• Group 1(UCS = shock)

– Sweet water  No avoidance

– Bright noisy water  Avoidance

• Group 2 (UCS = illness)

– Sweet water  Avoidance

– Bright noisy water  No avoidance

Temporal Contiguity is Not Enough



• Contingency: The CS must reliably predict

the occurrence of the UCS (Rescorla, 1966)

• Informativeness: The CS must provide

new information for predicting the

occurrence of the UCS

Contingency (Rescorla, 1966)

• UCS = shock (S), UCR = fear

• CS = tone (T)

• Training: two conditions

– Random Condition: S TS S T TS S T TS

– Contingent Condition: TS TS TS

• Results: Rats learned to fear the tone only in

the contingent condition, when the tone

predicted the shock

Informativeness: Blocking

• If an organism has already learned that one

CS predicts the UCS, that will block the

conditioning of a new CS if the new CS

does not provide any additional information

• Example: Fear conditioning of a tone

blocks conditioning of a light

Blocking

Training 1 Training 2 Test

-none- Tone & Light, Light 

shock

Fear

(CR = fear)

Tone, shock Tone & Light, Light 

(CR = fear) shock

No Fear

(CR = fear)

Rescorla-Wagner Model (1972)

• A mathematical model of the “strength of

association” produced in classical

conditioning

• Can account for all of the classical

conditioning phenomena we have just seen

• Uses just one single equation!

Rescorla-Wagner Model

ΔVn = c (Vmax – Vn)

V = the strength of association between a CS and a

US

ΔVn = the change in the strength of association

between the CS and US on a given trial

Vmax = the asymptote for CS-US association strength

after learning

c = rate of conditioning (how fast the association is

learned)

Rescorla-Wagner Model

Associative Strength

between CS and US 1.2

1

0.8

0.6

0.4

0.2

0

0 1 2 3 4 5 6 7 8 9 10

Conditioning Trials

Cognitive Interpretation of

Classical Conditioning

• Classical Conditioning is more than simple

association

• The concept of information could explain

contingency and blocking

• They are not just associating stimuli, they

are seeking information from one stimulus

to predict the occurrence of the other

Operant Conditioning

• The law of effect: behaviors that are

followed by good things happen more often

• Association: Things that occur together

become associated

Basics of Operant Conditioning

• Operant – freely emitted behavior operating

on the organism’s environment; NOT a reflex

response

• Reinforcement Contingencies – the

consequences that follow a behavior

– Reinforcement: increases the frequency of the

behavior

– Punishment: decreases frequency of behavior

Reinforcement & Punishment

• Positive reinforcement

• Negative reinforcement

• Positive punishment

• Negative punishment

Reinforcement Schedules

• Continuous vs. Partial

• Fixed vs. Variable

• Interval vs. Ratio

• Examples

– Fixed ratio: vending machine

– Variable ratio: slot machine

– Fixed interval: checking mailbox

– Variable interval: checking email

Explaining Complex Learning

with Operant Conditioning

• Secondary reinforcers - association

• Shaping – simple learning in small

increments

• Chaining – small increments plus

secondary reinforcement

• Language – association and reinforcement

(Skinner’s Verbal Behavior, 1957)

Learning that Could not be

Explained by Behaviorism

• Latent Learning – learning without

reinforcement (Tolman & Honzig, 1930)

• Observational Learning – learning without

behaving or being reinforced (Bandura, 1977)

• Overjustification – when rewards decrease the

frequency of behavior (but see Eisenberger & Cameron, 1996

for an opposing view)

• Language Acquisition – Chomsky’s critique

Latent Learning

Tolman & Honzig, 1930



Group 1: never a food reward

Group 2: always a food reward

Group 3: food reward after 10 days

10



9



8



7



6

Group 1

5 Group 2

Group 3

4



3



2



1



0

Day 1 Day 4 Day 8 Day 12 Day 16

Behaviorism Falls Short:

Language

• Chomsky: “Action in the past” as a property of

stimuli is sneaking mental representations in the

back door

• Association is insufficient to explain language

learning: The evidence points to learning RULES

• Evidence: Over-regularization (“goed”)

• Conclusion: Mere associations between words

can not explain language; any adequate theory of

meaning must hypothesize internal representations

of the rules of language (grammar)

So What was Behaviorism

Lacking?

• Symbolic Representation – we have

internal (mental) representations for things

in the external world

• Structure – we learn sets of rules for

combining symbols (e. g., grammar), not

just associations between pairs of symbols

Associative Learning Rises Again?

• LSA – Latent Semantic Analysis

– A theory of meaning, and a method for computer

analysis of the meanings of texts

– The meaning of a word = all of the words that co-occur

with it in a sample of written text (roughly)

– Meaning is just a function of associations of words, not

structure (syntax)

– How much of language meaning can LSA account for?

A surprisingly large amount.

behavior

Operant Conditioning in Real Life

 Behavior Modification

 The application of operant conditioning

techniques to

 teach new responses

 Reduce or eliminate maladaptive or problematic

behavior

 Also called applied behavior analysis

When Punishment Works

 Immediately punishing (removing) a self-

destructive behavior eliminates it

 Milder punishments appear to work as well as

harsh ones

 Consistency is important

When Punishment Fails



 People often administer punishment inappropriately

 The recipient responds with anxiety, fear, or rage

 The effectiveness is often temporary

 Most misbehavior is hard to punish immediately

 Punishment conveys little information

 An action intended to punish may instead be

reinforcing

External and Internal Reinforcers

 External reinforcers (grades)

 Reinforcers that are not inherently related to the

activity being reinforced

 Internal reinforcers (guilt)

 Reinforcers that are inherently related to the

activity being reinforced

 External reinforcers may undermine internal

reinforcers

Latent Learning (Tolman)

 Rats: one maze trial/day

 One group found food every

time (red line)

 Second group never found

food (blue line)

 Third group found food on

Day 11 (green line)

 Sudden change, Day 12

 Learning isn’t the same as

performance

Albert Bandura

1925 - Present

Social Learning

 Social cognitive theories emphasize how

behavior is learned and maintained:

 through observation and imitation of others

 positive consequences,

 cognitive processed such as plans, expectations,

and beliefs

 Observational learning involves learning new

responses by observing the behavior of

another rather than through direct experience

Observational Learning

Bandura hypothesized a four-step pattern

that combined a cognitive and operant view

of learning

notices something in the

Attention

environment

Retention remembers what was noticed



Reproduction produces an action that is a

copy of what was noticed

consequence changes the

Motivation

probability the behavior will be

emitted again

Observational Learning

Bobo Doll Experiment

Self-Efficacy



Self-reflection is a second human

quality and is expressed in the concept

of self-efficacy.



“Self-efficacy is the belief in one’s

capabilities to organize and execute the

sources of action required to manage

prospective situations.” (Bandura,

1986)

Self-Efficacy



Self-efficacy impacts:

• The choices we make

• The effort we put forth

• How long we persist when we confront

obstacles (especially in the face of

failure)

• How we feel about ourselves, others,

the task, etc.

Self-Efficacy



Self-efficacy is influenced by:

• Mastery experiences

• Vicarious experiences

• Social persuasions

• Physiological states

Self-Regulation



Self-regulation is a third human

capability and has several subfunctions:

• Goal-setting

• Self-observation and monitoring

• Performance judgment and

evaluation

• Self-reaction (e.g., self-satisfaction,

self-worth, distress)

Social Cognition



Bandura’s basic position is that



“People's level of motivation, affective

states, and actions are based more on

what they believe than on what is

objectively the case.”

“IT’S TRUE BECAUSE I BELIEVE IT.” –

I assume that what I believe is true even though I

have never questioned the basis for many of my

beliefs.



“IT’S TRUE BECAUSE WE BELIEVE IT.” –

I assume that the dominant belief of the groups to

which I belong are true, even though I have never

questioned the basis for those beliefs.

Preview . . .

Social & Cultural Psychology



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