Learning Theory and Nicotine Addiction | AQA A-Level Psychology Revision

Revision Notes
Aug 7
27 min read

Updated: Aug 14

For 7182 specification, first teach in September 2025

AQA A-Level Psychology | Free Revision Notes

Estimated study time: 65 to 80 minutes

Learning theory and nicotine addiction A-Level Psychology revision examines how smoking may be acquired and maintained through reinforcement and learned associations. Nicotine can provide rewarding effects, while smoking can also remove unpleasant withdrawal symptoms. At the same time, environmental situations repeatedly associated with smoking can become conditioned cues that trigger craving.

This lesson focuses particularly on cue reactivity, which AQA explicitly requires as part of the learning explanation of nicotine addiction. You will also consider why learning theory is useful but cannot fully explain the biological aspects of nicotine dependence.

Learning Objectives 🎯

By the end of this revision page, you should be able to:

Apply positive and negative reinforcement to nicotine addiction.
Explain how classical conditioning creates smoking-related cues.
Explain cue reactivity and its relationship with craving.
Apply learning theory to unfamiliar examples of smoking behaviour.
Explain how learned cues may contribute to relapse.
Evaluate learning theory as an explanation of nicotine addiction.

Revision Notes 📚

Learning Theory and Nicotine Addiction A-Level Psychology Revision Focus

The AQA specification requires:

learning theory as applied to nicotine addiction, including reference to cue reactivity.

The learning explanation can be understood through two main processes:

Operant conditioning, particularly positive and negative reinforcement.
Classical conditioning, particularly the development of smoking cues and cue reactivity.

The behaviourist approach covered elsewhere in the course includes classical conditioning, operant conditioning and types of reinforcement.

Applied to nicotine addiction:

Nicotine produces rewarding or relieving consequences → smoking is reinforced → situations repeatedly associated with smoking become conditioned cues → those cues later trigger craving → smoking is repeated

Learning theory therefore helps explain both:

Why smoking behaviour is maintained.
Why smokers can experience strong urges in particular situations.

Learning Theory Does Not Mean Smoking Is Simply a Habit

Calling smoking “learned” does not mean it is trivial or easy to stop.

Learning may become extremely powerful because:

Smoking occurs repeatedly.
Nicotine produces immediate consequences.
Withdrawal creates repeated opportunities for reinforcement.
The same environmental cues are paired with cigarettes many times.
Learned cues can persist after a person decides to stop.

Learning theory therefore helps explain why someone might sincerely want to quit but still experience a strong urge when:

Drinking coffee.
Seeing another person smoke.
Going to a pub.
Finishing a meal.
Taking a work break.

Operant Conditioning

What Is Operant Conditioning?

Operant conditioning is learning through the consequences of behaviour.

A behaviour becomes more likely when it is followed by reinforcement.

For nicotine addiction:

Smoking → reinforcing consequence → smoking becomes more likely in the future

The two important forms are:

Positive reinforcement.
Negative reinforcement.

Reinforcement Increases Behaviour

Both positive and negative reinforcement increase the likelihood that a behaviour will occur again.

This is an important exam distinction.

Process	What happens?	Effect on smoking
Positive reinforcement	Something rewarding is obtained	Smoking increases
Negative reinforcement	Something unpleasant is removed	Smoking increases
Punishment	An unpleasant consequence follows	Behaviour should decrease

Negative reinforcement is not punishment.

The word negative refers to the removal of something unpleasant.

Positive Reinforcement

What Is Positive Reinforcement?

Positive reinforcement occurs when a behaviour is followed by a desirable consequence, increasing the likelihood of that behaviour being repeated.

With nicotine:

Smoke cigarette → rewarding effects → increased likelihood of smoking again

Nicotine may be experienced as:

Pleasurable.
Stimulating.
Satisfying.
Associated with improved mood.
Rewarding.

The underlying reward processes link with brain neurochemistry and dopamine in nicotine addiction [Lesson 4: Neurochemistry and nicotine addiction].

A Simple Example

Ella tries a cigarette at a party and experiences the effects of nicotine as pleasant.

The sequence is:

Ella smokes.
Nicotine produces a rewarding effect.
The rewarding consequence follows smoking.
Smoking is positively reinforced.
Ella becomes more likely to smoke again.

The behaviour has been strengthened by its consequence.

Positive Reinforcement and Initiation

Positive reinforcement may be particularly useful for explaining why smoking continues after early experiences.

A person may initially smoke because of:

Curiosity.
Social influence.
Modelling.
Availability.

Once smoking occurs, its consequences can reinforce continued use.

This means the reason someone starts smoking need not be identical to the reason they continue smoking.

For example:

Peer influence initiates smoking → nicotine reward reinforces repeated smoking

This links with family and peer influences on addiction [Lesson 3: Personality and social influences].

Negative Reinforcement

What Is Negative Reinforcement?

Negative reinforcement occurs when behaviour removes or reduces an unpleasant state, increasing the probability that the behaviour will be repeated.

For an established smoker:

Nicotine level falls → withdrawal symptoms develop → cigarette is smoked → withdrawal decreases → smoking is reinforced

Possible withdrawal experiences include:

Irritability.
Restlessness.
Difficulty concentrating.
Anxiety.
Strong craving.

These features connect with physical dependence, tolerance and withdrawal syndrome [Lesson 1: Describing addiction].

A Full Negative Reinforcement Sequence

Consider:

Adam has not smoked for several hours. He becomes irritable and finds it difficult to concentrate. After smoking, these unpleasant feelings reduce.

Learning theory explains this as follows:

Nicotine deprivation produces an unpleasant state.
Adam smokes.
The unpleasant withdrawal symptoms decrease.
Their removal acts as negative reinforcement.
Adam learns that smoking removes discomfort.
Smoking becomes more likely when withdrawal occurs again.

The Important Exam Link

Do not write only:

Smoking is negatively reinforced.

Explain what is removed:

Smoking is negatively reinforced because nicotine reduces unpleasant withdrawal symptoms, so smokers learn to repeat smoking whenever withdrawal develops.

That final link is what turns a definition into an explanation.

Positive and Negative Reinforcement Together

A smoker does not have to be maintained by only one type of reinforcement.

Both may operate.

Early Smoking

Smoking may be maintained partly because nicotine produces:

Pleasure.
Stimulation.
Reward.

This is positive reinforcement.

Established Dependence

As physical dependence develops, smoking may increasingly be maintained because it removes:

Irritability.
Craving.
Restlessness.
Other withdrawal symptoms.

This is negative reinforcement.

The Combined Cycle

Smoke → reward → nicotine level eventually falls → withdrawal → smoke → relief → nicotine level falls again → withdrawal → smoke again

The cycle can make repeated smoking increasingly persistent.

Negative Reinforcement and the Experience of “Relaxation”

Smokers sometimes report that cigarettes help them relax.

Learning theory can offer an important interpretation.

An established smoker may experience tension partly because nicotine levels have fallen.

Smoking then reduces the withdrawal-related discomfort.

The person may interpret this as:

“Smoking relaxes me.”

From the negative reinforcement perspective:

Some of the relief may result from removal of an unpleasant nicotine-deprivation state.

This is different from claiming that cigarettes universally reduce ordinary stress.

Exam Application

Suppose a stem states:

“Whenever Charlie has gone without a cigarette for several hours, he becomes tense. He says a cigarette immediately makes him feel better.”

A strong application would be:

Charlie’s smoking is negatively reinforced because smoking removes the unpleasant tension associated with nicotine withdrawal. As this relief follows smoking, he becomes more likely to smoke whenever the tension occurs again.

Classical Conditioning

What Is Classical Conditioning?

Classical conditioning is learning through association.

A previously neutral stimulus is repeatedly paired with a stimulus that naturally produces a response.

Eventually, the neutral stimulus becomes a conditioned stimulus, capable of producing a learned response by itself.

Applied to smoking:

Smoking-related situation + nicotine effects → repeated association → situation becomes a smoking cue → cue produces craving

This is central to understanding cue reactivity.

The Classical Conditioning Terms

Term	Meaning in nicotine addiction
Neutral stimulus, NS	A situation that initially does not produce nicotine craving
Unconditioned stimulus, UCS	Nicotine and its pharmacological effects
Unconditioned response, UCR	Natural response to nicotine, such as reward or relief
Conditioned stimulus, CS	Previously neutral smoking-related cue after repeated association
Conditioned response, CR	Learned craving, urge or other cue-related response

Before Conditioning

Imagine that before someone becomes a smoker, drinking coffee does not make them crave nicotine.

Coffee = NS → no conditioned nicotine craving

Nicotine naturally produces its pharmacological effects:

Nicotine = UCS → rewarding or relieving response = UCR

During Conditioning

The person repeatedly smokes while drinking coffee:

Coffee + nicotine → nicotine effects

This happens many times.

The coffee and smoking experience become associated.

After Conditioning

Eventually:

Coffee = CS → craving or urge to smoke = CR

The coffee itself has become a smoking cue.

The person may now experience craving even before nicotine is consumed.

Environmental Smoking Cues

Almost anything repeatedly associated with smoking can become a conditioned cue.

Examples include:

Coffee.
Alcohol.
A work break.
Finishing a meal.
A particular chair.
A pub.
A car journey.
Seeing a cigarette packet.
Seeing a lighter.
Smelling cigarette smoke.
Seeing another person smoke.
Talking to particular friends.
A particular time of day.

Why There Can Be So Many Cues

A regular smoker may smoke:

Several times each day.
Across many environments.
During particular routines.
During specific emotional states.

This creates hundreds or thousands of opportunities for associations to develop.

The addiction therefore becomes connected with far more than nicotine itself.

Internal Cues

Cues do not always have to be objects or places.

Internal states may also become associated with smoking.

Examples include:

Stress.
Boredom.
Anxiety.
Tiredness.
Anger.
Loneliness.

For example:

Stress → repeatedly followed by cigarette smoking → stress becomes associated with smoking → later stress triggers craving

This may make the smoker believe:

“Whenever I feel stressed, I need a cigarette.”

The urge may partly reflect a learned association.

Cue Reactivity

What Is Cue Reactivity?

Cue reactivity is the psychological and physiological response produced when a person with an addiction encounters stimuli previously associated with the addictive substance.

In nicotine addiction, smoking-related cues may produce:

Craving.
Urge to smoke.
Anticipation of nicotine.
Increased physiological arousal.
Attention towards cigarettes.
Preparation to smoke.

The AQA specification explicitly names cue reactivity within the learning explanation of nicotine addiction.

Cue Reactivity as Classical Conditioning

Cue reactivity can be understood as a conditioned response.

The sequence is:

Neutral situation → repeatedly paired with smoking → conditioned smoking cue → craving

For example:

Work break → repeatedly paired with cigarette smoking → work break becomes CS → work break produces craving as CR

Why Cue Reactivity Matters

Cue reactivity explains why craving can appear very suddenly.

A person may feel relatively comfortable and then:

Smell smoke.
See someone lighting a cigarette.
Enter a familiar smoking area.
Finish a meal.

The learned cue activates an urge.

The smoker does not necessarily make a deliberate decision:

“I think now would be a good time to develop a craving.”

The response has been conditioned by repeated associations.

A Worked Cue Reactivity Example

Ben smoked every morning while drinking coffee for fifteen years. He has now stopped smoking. Although his physical withdrawal has reduced, he experiences a powerful urge for a cigarette whenever he makes coffee.

Before Conditioning

Coffee was originally a neutral stimulus.

During Conditioning

Coffee was repeatedly paired with:

Cigarette smoking.
Nicotine.
Nicotine-related reward or relief.

After Conditioning

Coffee has become a conditioned stimulus.

Cue Reactivity

Coffee now produces a conditioned response:

Craving.
Urge to smoke.

This can occur even though Ben has decided to quit.

Cue Reactivity and Physiological Responses

Cue reactivity is not limited to self-reported craving.

Researchers may measure responses such as:

Heart rate.
Sweat gland activity.
Skin conductance.
Skin temperature.

Carter and Tiffany reviewed 41 cue-reactivity studies involving several addictions, including cigarette smokers. Drug-related cues produced a strong overall increase in reported craving and smaller but measurable physiological changes compared with neutral cues.

This provides empirical support for the idea that addiction-related stimuli acquire the power to elicit responses.

Why This Supports Learning Theory

Classical conditioning predicts that:

Drug-related cues become associated with nicotine.
Those cues should eventually produce responses even without nicotine.
Smokers should therefore react differently to smoking cues than to neutral stimuli.

Cue-reactivity findings are consistent with that prediction.

Cue Reactivity and Craving

Smoking Cue

A smoking cue could be:

A lit cigarette

Neutral Cue

A neutral comparison stimulus could be:

An ordinary object unrelated to smoking

Researchers can compare:

Craving after the smoking cue.
Craving after the neutral cue.

If craving reliably rises in the smoking-cue condition, this supports the idea that learned associations influence craving.

Research on smokers commonly operationalises cue reactivity using changes in self-reported craving and physiological responses following exposure to smoking-related stimuli.

Cue Reactivity and Relapse

Why Cues Matter After Quitting

A person can stop consuming nicotine but still encounter conditioned cues.

For example:

Smokers at work + smell of smoke + usual break time

may all remain present.

This means two things can change at different rates:

Physical nicotine withdrawal may decrease.
Learned cue associations may remain.

A Possible Relapse Sequence

The person stops smoking.
They encounter a conditioned smoking cue.
The cue produces craving.
Craving increases motivation to smoke.
A cigarette is smoked.
Nicotine again provides reinforcement.
The old learning cycle is strengthened.

This explains why relapse can be strongly context-dependent.

Important Evaluation Point

Cue-induced craving does not guarantee relapse.

A person can experience craving and choose not to smoke.

Learning theory therefore explains increased likelihood, not inevitability.

Multiple Cues

Real-world smoking situations often involve several cues at once.

For example:

Friday evening + pub + alcohol + smoking friends + smell of cigarettes

Each may have been associated with smoking previously.

Together they may create a stronger trigger than one cue in isolation.

This helps explain why some situations are particularly high risk.

Cue Generalisation

What Is Generalisation?

Stimulus generalisation occurs when stimuli similar to the original conditioned stimulus also produce the conditioned response.

For example, if smoking frequently occurred in one pub:

That pub may become a CS.
Similar pub environments might also trigger craving.

Likewise:

One brand of cigarette packet.
Other cigarette packets.

may all become effective cues.

Why Generalisation Matters

Generalisation can increase the number of situations capable of triggering craving.

The smoker does not need to encounter the exact original stimulus.

Stimulus Discrimination

Discrimination occurs when a person learns to respond to particular cues but not others.

For example:

A smoker might strongly associate their morning coffee with cigarettes but experience little craving when drinking tea.

This demonstrates how specific individual learning histories can be.

Different smokers may therefore have completely different high-risk cues.

Cue Learning Is Individual

Two smokers may both be nicotine dependent but respond to different cues.

Smoker A

Strong triggers:

Coffee.
Driving.
Work breaks.

Smoker B

Strong triggers:

Alcohol.
Parties.
Particular friends.

Learning theory explains this through different reinforcement histories.

This is a useful strength because it can account for individual variation in situations that trigger smoking.

Extinction

What Is Extinction?

In classical conditioning, extinction occurs when a conditioned stimulus is repeatedly presented without the unconditioned stimulus.

The conditioned response gradually weakens.

Applied conceptually to smoking:

Smoking cue repeatedly occurs without nicotine → conditioned craving may weaken

For example:

Coffee is repeatedly consumed without a cigarette.

Over time, the coffee-smoking association may become weaker.

Extinction Does Not Mean Erasure

An extinguished conditioned response is not necessarily permanently deleted.

Learned responses can sometimes return.

For exam purposes, the key idea is simply:

Associations can weaken if cues repeatedly occur without being followed by smoking.

Classical and Operant Conditioning Work Together

The learning explanation becomes much stronger when classical and operant processes are linked.

Classical Conditioning

Explains:

Why situations trigger craving.

Operant Conditioning

Explains:

Why smoking is repeated once the urge appears.

Combined Example

Coffee becomes associated with smoking → coffee triggers craving → person smokes → nicotine provides reward or withdrawal relief → smoking is reinforced

The full cycle is:

Cue → craving → smoking → reinforcement → stronger smoking behaviour

Cue Reactivity and Negative Reinforcement Together

Consider:

Jamie sees colleagues going outside during their work break. This immediately makes him crave a cigarette. He has also not smoked for several hours and feels irritable.

Two learning processes are operating.

Classical Conditioning

The work break and colleagues are conditioned smoking cues.

They trigger craving.

Negative Reinforcement

Smoking removes Jamie’s withdrawal-related irritability.

This reinforces the behaviour.

A strong AQA answer may combine processes rather than pretending they operate separately.

Cue Reactivity and Positive Reinforcement Together

Ella smells cigarette smoke while at a party and experiences a strong urge to smoke. When she smokes, she experiences the nicotine effect as rewarding.

The smell acts as a conditioned cue.

The nicotine effect positively reinforces smoking.

Again:

Classical cue → operant consequence

Social Learning and Nicotine Use

Learning can also occur by observing other people.

A young person may observe:

Parents smoking.
Siblings smoking.
Friends receiving social approval for smoking.

They may learn that smoking is:

Normal.
Socially rewarding.
Associated with belonging.

This can contribute to initiation.

However, for this lesson the main AQA focus is the application of learning theory to nicotine addiction including cue reactivity, so classical and operant conditioning should remain central.

Social influences are explored more fully in family and peer influences on addiction [Lesson 3: Personality and social influences].

Applying Learning Theory to a Full Scenario

Georgia started smoking with friends during college lunch breaks. Several years later, she smokes regularly. If she goes without cigarettes for a few hours, she becomes irritable and restless. Smoking quickly reduces these feelings. Since attempting to quit, she finds that sitting outside the college café with old friends creates a powerful urge to smoke.

Social Context

Georgia originally smoked with friends.

This may have helped establish the behaviour.

Negative Reinforcement

When Georgia becomes irritable and restless:

These are unpleasant withdrawal experiences.
Smoking removes them.
Their removal negatively reinforces smoking.

Classical Conditioning

The café, friends and lunch-break setting have repeatedly been paired with smoking.

They have become conditioned stimuli.

Cue Reactivity

Returning to the café produces craving even while Georgia is trying to quit.

Overall Explanation

The learned environmental associations trigger the urge, while reinforcement has historically strengthened the smoking response.

Applying Learning Theory to Initiation and Maintenance

Learning theory can be used to distinguish different phases.

Stage	Possible learning process
Initial experimentation	Social modelling or contextual rewards
Early repeated smoking	Positive reinforcement
Established dependence	Positive and negative reinforcement
Habitual situations	Classical conditioning
Attempted abstinence	Cue reactivity
Relapse	Conditioned cue triggers smoking, followed by renewed reinforcement

This provides a fairly comprehensive account of how learned processes can operate over time.

Learning Theory and Neurochemistry

Learning and biological explanations overlap.

Negative reinforcement relies partly on an unpleasant withdrawal state.

That withdrawal exists because repeated nicotine use has changed biological functioning.

Similarly, positive reinforcement involves nicotine’s rewarding biological effects.

So:

Biology provides some of the consequences → learning explains how behaviour changes in response to those consequences

This links with brain neurochemistry and dopamine in nicotine addiction [Lesson 4: Neurochemistry and nicotine addiction].

Why This Matters for Evaluation

It would be misleading to treat the two explanations as complete opposites.

Learning theory can explain:

Why cues acquire meaning.
Why behaviour is repeated.
Why particular situations trigger craving.

Neurochemical explanations can explain:

Why nicotine is biologically rewarding.
Why withdrawal occurs.
Why nicotine affects brain reward systems.

An interactionist account may therefore be more complete.

Learning Theory and Treatment

Understanding learning processes can help explain why treatment may need to address more than nicotine itself.

For example:

Biological treatment may reduce withdrawal.
Psychological treatment may help the smoker manage conditioned cues.
CBT may identify high-risk situations and develop alternative responses.

This connects with:

drug therapy used to reduce nicotine dependence [Lesson 8: Drug therapy]
cognitive restructuring and coping strategies [Lesson 10: Cognitive behaviour therapy]

The learning explanation therefore has practical value because it identifies specific triggers that may maintain smoking.

Evaluating the Learning Explanation

Strength: Research Supports Cue Reactivity

One of the strongest parts of the learning explanation is evidence that addiction-related cues produce measurable responses.

Carter and Tiffany’s meta-analysis included 41 studies comparing drug-related and neutral cues across addictions including cigarette smoking. Drug cues produced a strong overall craving response, with additional physiological changes.

This supports the prediction that:

Previously associated stimuli acquire the ability to trigger responses.

That is exactly what a conditioning account predicts.

Why a Meta-Analysis Is Useful

A meta-analysis combines findings from many studies.

This may provide stronger evidence than relying on one experiment because:

Larger amounts of data are considered.
Consistent patterns can be identified.
Findings are less dependent on one sample or procedure.

The evidence therefore gives learning theory good empirical support.

Limitation: Cue Reactivity Is Not Identical to Smoking

A person may show:

Increased craving.
Increased heart rate.
Increased skin conductance.

without actually smoking.

This distinction matters.

Learning theory predicts increased motivation, but:

Cue → craving

does not automatically mean:

Cue → cigarette

Research has also found that different cue-reactivity measures, such as subjective craving and physiological responses, do not always correlate strongly with one another.

Why This Matters

Cue reactivity may demonstrate a learned response without proving that the response directly causes:

Smoking.
Relapse.
Long-term dependence.

Other factors influence whether the person acts on the craving.

Strength: Explains Situational Craving

A purely biological account has difficulty explaining why craving can suddenly increase in one particular environment.

Learning theory can explain why someone may feel:

Little craving at home.
Intense craving outside a pub where they previously smoked.

The nicotine level may be similar, but the environmental cues differ.

This gives classical conditioning particular explanatory value.

Strength: Explains Individual Differences in Triggers

Learning histories differ.

As a result:

Coffee may trigger one smoker.
Alcohol may trigger another.
Stress may trigger another.
Driving may trigger another.

This fits the observation that addictive behaviour is often highly context-dependent.

Learning theory therefore avoids assuming that all smokers respond identically.

Strength: Explains Maintenance Through Reinforcement

Operant conditioning provides a clear explanation of why smoking persists.

Positive Reinforcement

Smoking can produce a rewarding consequence.

Negative Reinforcement

Smoking can remove withdrawal discomfort.

Both consequences increase the probability of future smoking.

This explains why smoking can become very persistent once dependence develops.

Strength: Explains Relapse

A person may have stopped consuming nicotine but still encounter conditioned smoking cues.

Cue reactivity can therefore explain why:

Craving returns.
Old routines become tempting.
Particular environments increase relapse risk.

This is practically useful because it suggests that successful quitting involves managing both:

Physical dependence.
Learned associations.

Strength: Practical Applications

Learning theory identifies:

High-risk cues.
Reinforcing consequences.
Situations associated with smoking.

This information can be used when planning psychological interventions.

For example, CBT can help someone:

Identify smoking triggers.
Challenge thoughts connected with those triggers.
Practise alternative behaviour.

The practical applications increase the usefulness of the explanation.

Limitation: Learning Theory Cannot Fully Explain Physical Dependence

Learning theory describes:

Consequences.
Associations.
Behaviour.

It does not by itself explain why nicotine withdrawal exists biologically.

For example, negative reinforcement says:

Smoking reduces withdrawal.

But the learning account alone does not explain the neurochemical processes creating that withdrawal.

This requires a biological explanation.

Evaluation

Learning theory may therefore explain the behavioural maintenance of addiction better than the biological origin of dependence.

Limitation: Biological Factors Are Important

Nicotine addiction also involves:

Brain neurochemistry.
Dopamine.
Individual biological vulnerability.

The AQA specification explicitly includes brain neurochemistry alongside learning theory as an explanation for nicotine addiction.

This suggests that a complete account should not reduce nicotine addiction to learned behaviour alone.

Interactionist Conclusion

A more convincing explanation is:

Nicotine produces biological reward and withdrawal, while learning determines how the smoker responds to these consequences and which environmental cues acquire motivational power.

The two approaches complement each other.

Limitation: Environmental Reductionism

Learning theory can be criticised as environmentally reductionist because it focuses on:

Reinforcement.
Conditioned associations.
Environmental cues.

Nicotine addiction is more complex.

Other influences include:

Genetics.
Personality.
Family.
Peers.
Neurochemistry.
Cognition.

Reducing addiction to cue-response and reinforcement relationships may overlook these wider influences.

This connects with levels of explanation and environmental reductionism [Lesson 5: Holism and reductionism].

Limitation: Environmental Determinism

A strong learning account may imply:

Cues and reinforcement histories determine smoking behaviour.

This can underestimate conscious decision-making.

For example, two former smokers may both enter a pub and experience craving.

One relapses.

The other uses coping strategies and does not smoke.

This shows that conditioned responses can influence behaviour without completely determining it.

Limitation: Laboratory Cue Studies May Lack Ecological Validity

Cue-reactivity research often compares controlled smoking-related cues with neutral stimuli.

This provides:

Standardisation.
Control.
Clear comparison.

However, real smoking environments are much more complex.

A real-life craving might involve:

Stress.
Alcohol.
Friends.
Smell of smoke.
Availability of cigarettes.
Memories.
Social expectations.

A laboratory cue may not recreate the combined effect of these factors.

Methodological Trade-Off

Laboratory research offers:

High control

but potentially:

Lower realism

Both should be considered when evaluating the evidence.

Limitation: Individual Cues Are Difficult to Standardise

A cue such as:

A picture of a cigarette

may be highly meaningful to one smoker and relatively weak for another.

Personally relevant cues might include:

A specific friend.
A particular pub.
A particular morning routine.

Standardised laboratory cues may therefore underestimate or misrepresent real cue reactivity.

Limitation: Self-Reported Craving

Craving is often measured through self-report.

This may be affected by:

Social desirability.
Demand characteristics.
Different interpretations of rating scales.
Awareness of the experiment’s purpose.

A participant may guess:

“The researcher expects me to report stronger craving when I see the cigarette.”

This could inflate apparent cue reactivity.

Counterargument

Researchers can also collect physiological measures.

This provides evidence beyond self-report, although physiological and subjective responses are not always strongly related.

Limitation: Cause and Effect Can Be Complicated

A correlation between:

Strong cue reactivity.
Heavy smoking.

does not necessarily mean cue reactivity caused the heavier smoking.

It is also possible that:

Heavier smoking → more repeated cue-nicotine pairings → stronger cue reactivity

The relationship can therefore be bidirectional.

Experimental cue studies help establish that cues can produce responses, but long-term addiction remains more complex.

Limitation: Cognition May Matter

The same cue can be interpreted differently.

For example:

A former smoker sees someone smoking.

One person thinks:

“I miss that.”

Another thinks:

“I am glad I quit.”

Learning theory explains the conditioned association, but beliefs and conscious interpretations may affect the final behavioural response.

This suggests that cognitive processes can moderate learned cue reactivity.

Limitation: Not All Smokers Show the Same Level of Cue Reactivity

Learning theory predicts that repeated associations can create cues, but people differ substantially in:

Strength of craving.
Relevant stimuli.
Motivation.
Dependence.
Coping ability.

Cue reactivity is therefore probabilistic rather than universal.

This prevents a simple claim such as:

“Every smoking cue causes every smoker to relapse.”

Comparison with the Neurochemical Explanation

Learning explanation	Neurochemical explanation
Focuses on learned behaviour	Focuses on biological mechanisms
Uses classical conditioning	Focuses on receptors and neurotransmitters
Uses positive and negative reinforcement	Explains nicotine reward biologically
Explains environmental cues	Explains dopamine-related effects
Explains context-dependent craving	Explains physical dependence
Helps explain relapse in certain settings	Helps explain withdrawal
May underestimate biology	May underestimate environmental learning

Which Is Better?

Neither explanation accounts for everything.

The biological explanation can tell us why nicotine has reinforcing effects.

Learning theory can tell us how those effects shape behaviour.

Therefore:

Biology supplies consequences that can act as reinforcers, while learning determines how smoking becomes connected to particular responses and contexts.

This is a strong interactionist judgement.

Overall Evaluation

Learning theory explains nicotine addiction through reinforcement and association.

Operant conditioning proposes that smoking is strengthened because nicotine can provide rewarding effects through positive reinforcement. As dependence develops, smoking may also be negatively reinforced because it removes unpleasant withdrawal symptoms.

Classical conditioning explains how neutral situations repeatedly associated with smoking become conditioned stimuli. Coffee, work breaks, alcohol, certain friends or the smell of smoke may later produce conditioned craving. This is cue reactivity.

Research provides good support for cue reactivity. Carter and Tiffany’s meta-analysis found that drug-related cues reliably produced increased craving and physiological responding compared with neutral stimuli.

However, craving does not automatically result in smoking, and different measures of cue reactivity do not always correspond closely. Learning theory also cannot fully explain the biological mechanisms creating nicotine reward, dependence and withdrawal.

The most convincing conclusion is therefore that learning theory provides an important explanation of how nicotine-taking behaviour is maintained and why environmental cues trigger craving, but it works best alongside the neurochemical explanation rather than replacing it.

Key Words 🔑

Key word	Student-friendly definition	How it may be used in an exam
Learning theory	Explanation that behaviour develops through experience, association and consequences	Introduce the explanation
Operant conditioning	Learning through the consequences of behaviour	Explain repeated smoking
Reinforcement	A consequence that increases behaviour	Explain maintenance
Positive reinforcement	A rewarding consequence is added	Explain nicotine reward
Negative reinforcement	An unpleasant state is removed	Explain withdrawal relief
Punishment	A consequence intended to reduce behaviour	Distinguish from negative reinforcement
Classical conditioning	Learning through association between stimuli	Explain smoking cues
Neutral stimulus	A stimulus that initially does not produce the conditioned response	Identify a cue before learning
Unconditioned stimulus	A stimulus that naturally produces a response	Apply nicotine in conditioning
Unconditioned response	A natural response to the UCS	Explain nicotine effects
Conditioned stimulus	A previously neutral stimulus that produces a learned response after conditioning	Identify a smoking cue
Conditioned response	The learned response to the CS	Explain cue-induced craving
Smoking cue	A stimulus associated with previous cigarette smoking	Apply cue reactivity
Cue reactivity	Psychological or physiological responding to an addiction-related cue	Core AQA terminology
Craving	A strong urge to smoke	Explain the conditioned response
Withdrawal	Unpleasant symptoms after nicotine use is reduced	Explain negative reinforcement
Physical dependence	Physiological adaptation to nicotine	Link learning with withdrawal
Reward	A desirable consequence of smoking	Explain positive reinforcement
Relief	Reduction of an unpleasant state	Explain negative reinforcement
Environmental cue	A place, object, person or situation associated with smoking	Apply classical conditioning
Internal cue	An emotional or physical state associated with smoking	Apply conditioning to stress
Stimulus generalisation	Similar stimuli also trigger the learned response	Explain multiple smoking cues
Stimulus discrimination	Learning to respond only to particular cues	Explain individual triggers
Extinction	Weakening of a conditioned response when the CS occurs without the UCS	Explain weakening of smoking associations
Relapse	Return to smoking after attempting to stop	Apply cue reactivity
Ecological validity	Extent to which findings apply to real-life behaviour	Evaluate cue experiments
Demand characteristics	Cues that reveal what participants think researchers expect	Evaluate craving research
Environmental reductionism	Explaining behaviour mainly through environmental learning processes	Evaluate learning theory
Environmental determinism	View that behaviour is strongly controlled by environmental learning	Evaluate personal choice
Interactionism	View that different explanations work together	Combine learning and biology

Hints from the Examiner Reports 💡

No lesson-specific examiner guidance was identified in the provided reports.

Closely Related AQA Assessment Guidance

AQA’s specification makes cue reactivity an explicit part of the learning explanation of nicotine addiction. This means a response on learning theory should not consist solely of:

Positive reinforcement.
Negative reinforcement.

Students should also be ready to explain how:

Neutral environmental stimuli become conditioned smoking cues and later trigger craving.

Apply the Learning Process, Not Just the Label

Weak answer:

Coffee is a cue.

Developed answer:

Coffee has repeatedly been paired with cigarette smoking, so through classical conditioning it becomes a conditioned stimulus. Coffee can then trigger craving as a conditioned response even when nicotine is not currently being consumed.

Explain Negative Reinforcement Correctly

Weak answer:

Nicotine negatively reinforces smoking because smoking is bad for you.

This is incorrect.

Better:

When nicotine levels fall, withdrawal symptoms such as irritability occur. Smoking reduces these unpleasant symptoms, so their removal negatively reinforces smoking.

Explain Positive Reinforcement Correctly

Weak answer:

Nicotine is positively reinforced.

Behaviours are reinforced.

Better:

Smoking is positively reinforced because nicotine produces a rewarding consequence, making smoking more likely to be repeated.

Make the Behaviour Clear

AQA questions are about nicotine addiction, not learning theory in the abstract.

Every explanation should return to:

Smoking.
Craving.
Withdrawal.
Repeated nicotine use.

Use the Conditioning Terminology Carefully

A strong classical-conditioning explanation may identify:

NS.
UCS.
UCR.
CS.
CR.

However, terminology should help explain the process rather than become an unexplained list.

Cue Reactivity Is More Than “Wanting a Cigarette”

Explain the mechanism:

A smoking-related cue has acquired an association with nicotine and therefore elicits a conditioned response such as craving.

Use Scenario Details

Suppose a stem says:

“Louise always smokes after dinner and now feels an urge as soon as she clears her plate.”

Do not write merely:

Louise shows cue reactivity.

Explain:

Finishing dinner has repeatedly been paired with nicotine consumption and has become a conditioned stimulus. It now triggers craving as a conditioned response.

Distinguish Cue Reactivity from Withdrawal

Cue reactivity: Triggered by a learned smoking-related stimulus.

Withdrawal: Occurs because nicotine use has been reduced or stopped after dependence.

They can occur together, but they are not the same thing.

Evaluation Should Target the Explanation

Weak:

Carter and Tiffany used a meta-analysis.

Developed:

Carter and Tiffany found that drug-related cues produced increased craving compared with neutral cues, supporting the conditioning prediction that addiction-related stimuli acquire the ability to elicit responses.

Avoid Generic Reductionism

Weak:

Learning theory is reductionist.

Developed:

Learning theory reduces nicotine addiction mainly to reinforcement and conditioned associations, so it cannot fully explain biological mechanisms such as nicotine-related neurochemical changes and physical withdrawal.

Use an Interactionist Conclusion

A strong judgement is:

Learning and biological processes interact. Withdrawal provides an unpleasant state that can negatively reinforce smoking, while environmental cues become associated with the biological effects of nicotine and later trigger craving.

Distinguish cue-induced craving from actual relapse.

Mistake 15

Mistake: Writing mainly about gambling reinforcement schedules.

Why this is outside this lesson:

Partial and variable reinforcement are specified separately for gambling addiction.

How to improve:

Keep the answer focused on nicotine, reinforcement and cue reactivity.

Exam-Style Questions ✍️

Question 1

Explain what is meant by negative reinforcement in relation to nicotine addiction. [2 marks]

Question 2

Explain how positive reinforcement may maintain smoking behaviour. [3 marks]

Question 3

Explain cue reactivity in nicotine addiction. [4 marks]

Question 4

Nora always smokes while drinking coffee before work. She has recently stopped smoking, but she experiences a strong urge for a cigarette whenever she makes coffee.

Use learning theory to explain Nora’s craving. [6 marks]

Question 5

Explain one difference between classical conditioning and operant conditioning as applied to nicotine addiction. [4 marks]

Question 6

Sam has not smoked for five hours. He feels irritable and restless. He then smokes a cigarette and says that he immediately feels better.

Use learning theory to explain why Sam’s smoking is likely to continue. [4 marks]

Question 7

Researchers exposed nicotine-dependent smokers to either smoking-related cues or neutral cues. Mean craving was recorded on a scale from 0 to 20.

Condition	Mean craving score
Neutral cues	8
Smoking cues	14

Calculate the percentage increase in mean craving in the smoking-cue condition compared with the neutral-cue condition. Explain one conclusion and one limitation of the investigation. [6 marks]

Question 8

Explain one strength and one limitation of learning theory as an explanation of nicotine addiction. [6 marks]

Question 9

Discuss learning theory as an explanation of nicotine addiction. Refer to cue reactivity in your answer. [16 marks]

Answers and Mark Scheme

Question 1

Award one mark for each linked point:

Smoking removes or reduces an unpleasant state such as nicotine withdrawal.
This relief increases the likelihood that smoking will occur again.

Maximum: 2 marks

Question 2

Award one mark for each linked point, up to three marks:

Smoking is followed by nicotine’s rewarding effects.
The rewarding consequence acts as positive reinforcement.
The smoker becomes more likely to repeat smoking.
Repeated reinforcement may help maintain nicotine addiction.

Question 3

Award one mark for each relevant point, up to four marks:

Smoking-related environmental stimuli become associated with nicotine use.
This develops through classical conditioning.
Previously neutral stimuli become conditioned stimuli.
Examples include coffee, work breaks, alcohol or seeing cigarettes.
Exposure to the conditioned cue can produce craving.
Craving is a conditioned response.
Psychological or physiological reactions to smoking cues are examples of cue reactivity.

Question 4

Award up to six marks for effective application.

Possible content:

Coffee was originally a neutral stimulus in relation to nicotine craving.
Nora repeatedly paired coffee with cigarette smoking.
Nicotine acted as the unconditioned stimulus.
Its rewarding or relieving effect was the unconditioned response.
Coffee became a conditioned stimulus.
Nora’s current craving is a conditioned response.
This is cue reactivity.
The cue can produce craving even though Nora is not currently smoking.
Cue-induced craving may increase the risk of relapse.

A full-mark answer should explicitly connect classical conditioning with Nora’s coffee routine.

Question 5

Award up to four marks.

Possible answer:

Classical conditioning explains how smoking-related environmental stimuli become associated with nicotine. For example, drinking coffee can become a conditioned stimulus that produces craving. Operant conditioning explains how the consequences of smoking strengthen the behaviour. Nicotine may positively reinforce smoking through reward or negatively reinforce it by removing withdrawal symptoms.

Credit:

Accurate classical-conditioning description.
Accurate operant-conditioning description.
Direct distinction.
Appropriate nicotine application.

Question 6

Award up to four marks:

Sam’s irritability and restlessness are unpleasant withdrawal experiences.
He smokes and these feelings decrease.
Smoking therefore removes an aversive state.
This is negative reinforcement.
Because smoking produces relief, he becomes more likely to smoke when withdrawal occurs again.

Question 7

Difference in craving:

14−8=6

Percentage increase compared with the neutral condition:

86×100=75%

Mean craving was 75% higher in the smoking-cue condition.

Award up to two marks for the calculation.

Award up to two marks for a conclusion:

Smoking-related cues produced greater craving than neutral cues.
This is consistent with cue reactivity.
The result supports the prediction that smoking-associated stimuli can become conditioned stimuli.
Classical conditioning may therefore contribute to nicotine addiction.

Award up to two marks for a limitation:

Mean scores conceal individual differences.
No measure of dispersion is provided.
Craving is likely to rely on self-report.
Participants may guess the aim of the investigation.
Laboratory cues may not represent personally meaningful real-life triggers.
Greater craving does not prove greater actual smoking.
The sample size is unknown.
Other individual differences in dependence may affect responses.

Question 8

Award up to three marks for one developed strength and up to three marks for one developed limitation.

Possible strength:

Cue-reactivity research supports the learning explanation. Drug-related cues have been found to produce increased craving compared with neutral stimuli, as predicted if those cues have become conditioned through repeated association with substance use. Carter and Tiffany’s meta-analysis found a reliable cue-reactivity effect across addiction studies including smoking.

Possible limitation:

Learning theory cannot fully explain why nicotine withdrawal occurs because this depends on biological adaptation. Negative reinforcement explains why removing withdrawal strengthens smoking, but a neurochemical explanation is required to explain the physiological origin of withdrawal. Learning theory is therefore incomplete when used alone.

Other creditworthy evaluation includes:

Practical applications.
Individual differences in cues.
Ecological validity.
Craving not necessarily causing smoking.
Environmental reductionism.
Environmental determinism.
Interaction with neurochemistry.

Question 9

A high-level response should include accurate knowledge and developed evaluation.

Indicative AO1 Content

Learning theory as applied to nicotine addiction.
Operant conditioning.
Reinforcement increasing smoking.
Positive reinforcement.
Nicotine reward.
Negative reinforcement.
Withdrawal relief.
Physical dependence providing an aversive state.
Classical conditioning.
Neutral stimuli.
Repeated association with smoking.
Conditioned stimuli.
Conditioned craving.
Smoking-related environmental cues.
Internal cues.
Cue reactivity.
Psychological responses to cues.
Physiological responses to cues.
Cue reactivity and relapse.
Generalisation.
Extinction.
Possible contribution of social learning to initiation.
Interaction between classical and operant conditioning.

Indicative AO3 Content

Carter and Tiffany’s cue-reactivity evidence.
Meta-analytic support.
Controlled comparisons of drug and neutral cues.
Practical application to identifying high-risk situations.
Explanation of context-dependent craving.
Explanation of relapse.
Explanation of individual differences in smoking cues.
Positive and negative reinforcement explaining maintenance.
Craving not necessarily resulting in smoking.
Weak correspondence between different cue-reactivity measures.
Laboratory versus real-world cues.
Self-report and demand characteristics.
Problems standardising personally meaningful cues.
Physical dependence not fully explained.
Biological alternative involving neurochemistry.
Learning and biology being complementary.
Environmental reductionism.
Environmental determinism.
Role of cognition.
Individual differences.
Interactionist explanation.

Thirteen to sixteen marks: Knowledge is accurate and generally detailed. Positive and negative reinforcement, classical conditioning and cue reactivity are clearly explained and specifically linked to nicotine addiction. Discussion is thorough and focused, with effective evidence, comparison with biological explanations and a balanced judgement.

Nine to twelve marks: Knowledge is mostly accurate and discussion is generally effective. Reinforcement and cue reactivity are explained, although some concepts or evaluation may lack depth.

Five to eight marks: Some relevant knowledge is present, but the answer is mainly descriptive. There may be reasonable knowledge of reinforcement but limited explanation of cue reactivity, or evaluation may be generic.

One to four marks: Knowledge is very limited or confused. The response may confuse negative reinforcement with punishment, describe cues without classical conditioning or provide little relevant evaluation.