Systematic desensitisation | AQA A-Level Psychology Revision
Updated: Sep 9
For 7182 specification, first teach in September 2025
AQA A-Level Psychology | Free Revision Notes
Estimated study time: 45 minutes
These Systematic desensitisation A-Level Psychology revision notes explain how phobias can be treated through relaxation and gradual exposure to a feared stimulus. The client and therapist create an anxiety hierarchy, beginning with mildly distressing situations and progressing towards the strongest fear. Relaxation is paired with each stage so that the original anxiety response is gradually replaced. You will learn how reciprocal inhibition and counterconditioning operate, how to apply the treatment to scenarios and how to evaluate its effectiveness and appropriateness.
Systematic desensitisation, including relaxation and the use of a hierarchy, is a required behavioural treatment in the AQA specification.
Learning Objectives 🎯
By the end of this revision page, you should be able to:
Describe relaxation training.
Construct and explain an anxiety hierarchy.
Explain how gradual exposure is used during treatment.
Explain reciprocal inhibition and counterconditioning.
Apply systematic desensitisation to an unfamiliar phobia.
Evaluate the treatment’s effectiveness and appropriateness.
Revision Notes đź“š
Systematic desensitisation A-Level Psychology revision overview
Systematic desensitisation, often shortened to SD, is a behavioural therapy used to treat phobias.
The treatment combines:
Relaxation training.
An anxiety hierarchy.
Gradual exposure to the phobic stimulus.
The client learns to replace the fear response with a relaxation response.
The basic process is:
Relaxation training → construction of hierarchy → gradual exposure while relaxed → reduced phobic anxiety
Systematic desensitisation is based on the view that phobias are learned responses.
If fear can be learned, a different response can also be learned.
This connects directly with the behavioural explanation of phobia acquisition and maintenance.
What does systematic mean?
Systematic means that the treatment follows a planned and ordered sequence.
The client is not exposed to random fear-provoking situations.
Instead, exposure progresses:
From the least frightening step.
Through increasingly challenging steps.
Towards the most feared situation.
The order is agreed before exposure begins.
What does desensitisation mean?
Desensitisation means reducing the person’s emotional sensitivity to the phobic stimulus.
At the beginning of treatment, the stimulus may produce:
Intense anxiety.
Panic.
Avoidance.
Irrational beliefs.
Selective attention to possible danger.
Through repeated and controlled exposure, the person gradually becomes less anxious.
The aim is not to make the person emotionally numb.
The aim is to reduce a disproportionate fear response so that they can manage the situation more effectively.
The behavioural basis of systematic desensitisation
Learned fear
The behavioural approach explains phobias as learned.
Through classical conditioning:
A previously neutral stimulus becomes associated with fear.
The stimulus becomes a conditioned stimulus.
It later produces a conditioned fear response.
For example, after a painful dog bite:
A dog may become a conditioned stimulus.
Fear of dogs may become a conditioned response.
This process is explained fully in learning through stimulus association.
Avoidance maintains fear
After the phobia develops, the person may avoid the feared stimulus.
Avoidance reduces anxiety, so it is negatively reinforced.
For example:
The person sees a dog.
They feel anxious.
They cross the road.
Their anxiety decreases.
The relief makes future avoidance more likely.
The person never learns that they could remain near a calm dog safely.
Systematic desensitisation interrupts this avoidance cycle by introducing controlled exposure.
A new response is learned
During treatment, the phobic stimulus is paired with relaxation rather than fear.
The original pattern is:
Phobic stimulus → anxiety
The new pattern becomes:
Phobic stimulus → relaxation or manageable arousal
This process is known as counterconditioning.
The stages of systematic desensitisation
A systematic desensitisation programme usually involves three central components:
Learning relaxation techniques.
Creating an anxiety hierarchy.
Working gradually through the hierarchy while relaxed.
Overview of the procedure
Stage | What happens? | Purpose |
Assessment | The therapist identifies the phobic stimulus, triggers and effects | Ensures treatment is appropriate and individually designed |
Relaxation training | The client learns methods for reducing physical and emotional arousal | Produces a response that can compete with anxiety |
Anxiety hierarchy | Fear-provoking situations are ranked from least to most distressing | Provides an ordered exposure plan |
Gradual exposure | The client encounters each step while using relaxation | Pairs the feared stimulus with a new response |
Progression | The client moves upwards once the current step is manageable | Prevents exposure from becoming overwhelming |
Completion | The client eventually faces the most feared situation | Reduces avoidance and increases everyday functioning |
Stage one: assessment
Before exposure begins, the therapist needs to understand the phobia.
The assessment may identify:
The object or situation feared.
The situations that trigger anxiety.
The severity of the fear.
The person’s avoidance behaviour.
The effects on education, employment or relationships.
The thoughts associated with the stimulus.
Any situations that the person can already manage.
The client’s goals for treatment.
Why assessment matters
Two people with the same broad phobia may fear different things.
For example, two people with a fear of dogs might differ considerably.
One may fear:
Being bitten.
The other may fear:
Losing control and panicking in public.
Their anxiety hierarchies should therefore be different.
Identifying the practical goal
Treatment should be connected to the person’s ordinary life.
For example, the goal may be to:
Walk through a park.
Attend a medical appointment.
Travel by lift.
Visit a friend who owns a pet.
Complete a flight.
Speak in a particular social situation.
This helps determine whether treatment has produced a meaningful improvement rather than only reducing anxiety during therapy sessions.
Stage two: relaxation training
What is relaxation training?
Relaxation training teaches the client how to reduce physical and psychological arousal.
The client practises relaxation before beginning exposure.
Possible techniques include:
Controlled breathing.
Progressive muscle relaxation.
Visualising a calm situation.
Releasing muscular tension.
Focusing attention on slow, regular breathing.
The precise method can be adapted to the client.
Controlled breathing
Anxiety may be accompanied by rapid or shallow breathing.
The client may learn to:
Breathe in slowly.
Pause briefly.
Breathe out slowly.
Maintain a steady rhythm.
Focus attention on the breathing pattern.
This can help reduce physical arousal and give the client a practical response to use during exposure.
Progressive muscle relaxation
Progressive muscle relaxation involves deliberately tensing and then relaxing different muscle groups.
The client might work systematically through:
Hands.
Arms.
Shoulders.
Face.
Stomach.
Legs.
The person learns to recognise the difference between tension and relaxation.
They can then release tension when anxiety begins.
Practising the response
The client should be able to produce a reliable relaxation response before beginning the hierarchy.
This may require practice:
During therapy.
At home.
In neutral situations.
Before attempting a feared situation.
Exposure is less likely to be successful if the client has not learned the relaxation method properly.
Relaxation is an active skill
Relaxation is not simply being told:
“Try not to worry.”
The client learns and practises a specific response.
This response is later used while approaching the phobic stimulus.
Reciprocal inhibition
What is reciprocal inhibition?
Reciprocal inhibition is the principle that two opposing emotional or physiological states cannot be experienced fully at the same time.
Within systematic desensitisation, the opposing responses are:
Anxiety.
Relaxation.
The client is taught to remain relaxed while encountering the feared stimulus.
The relaxation response is intended to inhibit the anxiety response.
The basic principle
Relaxation and intense anxiety are incompatible responses.
If the client successfully maintains relaxation, the fear response should weaken.
Example
A person becomes anxious when imagining a spider.
They practise slow breathing and release muscular tension while continuing to imagine the spider.
As relaxation develops, anxiety falls.
Over repeated exposure, the spider image becomes associated with a calmer response.
Reciprocal inhibition is not simple distraction
The client is not merely encouraged to ignore the phobic stimulus.
They remain aware of or exposed to it while using the relaxation response.
The aim is to change the learned emotional association.
Counterconditioning
What is counterconditioning?
Counterconditioning involves replacing one conditioned response with a different conditioned response.
In a phobia:
The feared stimulus already produces anxiety.
Treatment pairs the stimulus with relaxation.
The relaxation response gradually replaces or competes with fear.
Before treatment
Dog → anxiety
During treatment
Dog-related stimulus + relaxation → reduced anxiety
After successful treatment
Dog → manageable or minimal anxiety
Counterconditioning and classical conditioning
Systematic desensitisation uses classical-conditioning principles.
The original fear association is not simply discussed.
A new association is learned through experience.
The client repeatedly experiences the phobic stimulus while:
Remaining safe.
Using relaxation.
Discovering that the feared outcome does not occur.
The abbreviated mark-scheme material supplied for this course identifies relaxation, hierarchy and reciprocal inhibition as central content for systematic desensitisation.
Stage three: constructing an anxiety hierarchy
What is an anxiety hierarchy?
An anxiety hierarchy is a list of situations involving the phobic stimulus, arranged from least to most anxiety-provoking.
The hierarchy is created collaboratively by:
The therapist.
The client.
The client’s own anxiety is used to rank the steps.
Why the hierarchy must be individual
Different people may rate the same situation differently.
For one person with a dog phobia:
Looking at a cartoon dog may produce almost no anxiety.
For another:
Even hearing the word “dog” may be distressing.
A standard hierarchy cannot simply be applied to everyone.
Building the hierarchy
The therapist and client may:
List a range of situations involving the stimulus.
Estimate the anxiety caused by each one.
Arrange them from least to most difficult.
Check that the increases between stages are manageable.
Adjust the order when necessary.
Example anxiety scale
The client may rate anxiety on a scale such as:
0:Â no anxiety.
10:Â extreme anxiety.
The numerical ratings help order the hierarchy.
They do not make anxiety completely objective because the ratings are based on the client’s own judgement.
Example anxiety hierarchy: fear of dogs
Hierarchy level / Example anxiety rating | Situation |
1 | Reading the word “dog” |
2 | Looking at a cartoon dog |
3 | Looking at a photograph of a calm dog |
4 | Watching a short video of a dog |
5 | Seeing a dog through a closed window |
6 | Standing at a distance from a dog on a lead |
7 | Standing closer to a calm dog |
8 | Remaining in the same room as a calm dog |
9 | Standing beside the dog and its owner |
10 | Touching or stroking the calm dog |
These ratings are illustrative.
The actual hierarchy would be based on the individual client’s experience.
Small and manageable steps
The progression should be gradual.
A poorly designed hierarchy might move directly from:
Looking at a photograph.
to:
Holding the feared animal.
This increase may be too large.
If the client becomes overwhelmed, they may:
Escape.
Refuse to continue.
Strengthen their avoidance.
Lose confidence in treatment.
Hierarchies can include different forms of exposure
A hierarchy may begin with indirect contact and gradually move towards direct contact.
Possible stages include:
Saying or reading a word.
Looking at a drawing.
Looking at a photograph.
Watching a video.
Imagining the situation.
Observing from a distance.
Entering the same environment.
Approaching the stimulus.
Direct interaction.
Imaginal and real-life exposure
Imaginal exposure
Imaginal exposure involves imagining the feared object or situation.
For example, a client may imagine:
Entering a lift.
Sitting on an aircraft.
Approaching a dog.
Receiving an injection.
Imaginal exposure may be useful when real exposure is:
Difficult to arrange.
Expensive.
Impractical.
Initially too distressing.
Real-life exposure
Real-life exposure involves direct contact with the feared stimulus or situation.
Examples include:
Standing near a calm dog.
Entering a lift.
Visiting an airport.
Attending a medical setting.
Real-life exposure allows the client to practise coping in a situation that resembles everyday life.
Moving from imagination to reality
A hierarchy may begin with imagined exposure and later progress to real-life exposure.
For example:
Imagine seeing a lift.
View a photograph of a lift.
Stand near a lift.
Watch other people use it.
Enter with the doors open.
Travel one floor with support.
Complete a longer journey independently.
This gradual progression helps transfer learning beyond the therapist’s office.
Working through the anxiety hierarchy
Beginning at the lowest step
The client starts with the least anxiety-provoking item.
They use the relaxation techniques while:
Imagining it.
Viewing it.
Approaching it.
Remaining in contact with it.
The client stays at this stage until the anxiety becomes manageable.
Progressing upwards
The client does not move immediately to the next stage.
Progress may occur when:
The client can remain relaxed.
Anxiety has fallen substantially.
The situation can be repeated successfully.
The client feels ready for the next step.
Repeating a stage
A hierarchy stage may need to be repeated several times.
Repeating it allows the client to learn that:
Anxiety can decrease without escape.
The feared outcome does not occur.
They possess coping skills.
Contact with the stimulus is manageable.
Returning to a lower step
Progress does not have to be perfectly linear.
The client might:
Repeat an earlier stage.
Divide one stage into smaller steps.
Use additional relaxation practice.
Delay progression temporarily.
This flexibility is one reason systematic desensitisation may be acceptable to clients who would reject more intense exposure.
Reaching the top of the hierarchy
Treatment continues until the person can face the highest item with little or manageable anxiety.
The final goal should ideally involve a meaningful real-life situation.
For example:
Travelling in a lift independently.
Attending a necessary medical procedure.
Entering a park containing dogs.
Completing a planned flight.
A complete systematic desensitisation sequence
Example: fear of injections
Suppose Daniel has an intense fear of injections and repeatedly avoids vaccinations.
Step 1: assessment
The therapist identifies that Daniel:
Becomes anxious when injections are mentioned.
Avoids medical settings.
Fears that the pain will be unbearable.
Has missed necessary appointments.
Step 2: relaxation
Daniel learns:
Slow breathing.
Progressive muscle relaxation.
How to recognise rising tension.
Step 3: hierarchy
Daniel creates the following sequence:
Reading the word “injection”.
Looking at a cartoon syringe.
Looking at a photograph of a syringe.
Watching a video of an injection.
Holding a capped syringe under professional supervision.
Sitting in a waiting room.
Watching somebody else receive an injection.
Preparing for an injection.
Receiving an injection.
Step 4: gradual exposure
Daniel begins with the lowest step while using relaxation.
He moves upwards only when each stage becomes manageable.
Step 5: new learning
Daniel learns that:
Anxiety can decrease.
The feared experience is tolerable.
He does not need to escape.
His predicted outcome does not occur.
Step 6: practical improvement
Treatment is successful when Daniel can attend a required appointment with manageable anxiety.
How systematic desensitisation reduces avoidance
Avoidance is one of the main behavioural characteristics of phobias.
It is also a major reason phobias continue.
Systematic desensitisation changes the pattern:
Before treatment
The person encounters or anticipates the stimulus.
Anxiety rises.
The person avoids it.
Anxiety falls.
Avoidance is reinforced.
During treatment
The person encounters a low-level version of the stimulus.
They use relaxation.
They remain in the situation.
Anxiety decreases without escape.
Avoidance becomes less necessary.
After successful treatment
The person becomes increasingly able to approach the feared situation without depending on avoidance.
How systematic desensitisation treats the phobic response
Several connected processes may explain improvement.
Reciprocal inhibition
Relaxation inhibits anxiety during exposure.
Counterconditioning
The feared stimulus becomes associated with relaxation rather than fear.
Reduced avoidance
The client remains in contact with the feared stimulus rather than escaping.
Safe learning
The client learns that:
The feared event does not occur.
Anxiety is temporary.
They can manage the situation.
Contact does not require escape.
Increased confidence
Completing each hierarchy stage may increase the client’s belief that they can cope.
Although the treatment is behavioural, the experience may also change thoughts such as:
“I cannot handle being near a dog.”
into:
“I managed the previous stage, so I may be able to manage this one.”
Measuring treatment progress
Progress should not be judged from one successful therapy session alone.
A therapist may consider several forms of evidence.
Self-reported anxiety
The client may rate anxiety:
Before treatment.
At each hierarchy stage.
After treatment.
At follow-up.
A reduction suggests improvement.
However, self-report may be affected by:
Social desirability.
Different uses of the rating scale.
A desire to please the therapist.
Temporary mood.
Behavioural evidence
The therapist may assess what the person can do.
For example:
Can they enter the feared setting?
Can they remain there?
Can they complete a journey?
Can they attend an appointment?
Have avoidance behaviours decreased?
Behavioural improvement may provide stronger evidence that treatment has affected everyday life.
Functional improvement
The therapy may be considered practically successful when it improves:
Education.
Employment.
Relationships.
Travel.
Healthcare.
Independence.
This connects with whether the person can manage ordinary life.
Follow-up assessment
A follow-up takes place after treatment has ended.
This helps establish whether improvement:
Continues.
Generalises to other settings.
Depends on the therapist being present.
Is followed by a return of fear.
Long-term improvement provides stronger evidence of effectiveness than an immediate reduction alone.
Evaluating effectiveness
What does effectiveness mean?
Effectiveness concerns whether the therapy successfully reduces the phobia.
Evidence of effectiveness might include:
Lower anxiety.
Reduced avoidance.
Ability to face the feared stimulus.
Improvement in everyday activities.
Benefits that continue after treatment.
Improvement beyond that seen without treatment.
Strength: it directly targets learned fear
Systematic desensitisation is logically connected to behavioural explanations.
If the phobia involves a learned fear response, the therapy:
Reintroduces the conditioned stimulus.
Pairs it with relaxation.
Prevents automatic avoidance.
Encourages new learning.
This gives the treatment a clear psychological rationale.
Strength: treatment can produce meaningful behavioural change
The goal is not only for clients to say that they feel better.
They should become able to do activities previously avoided.
For example:
Travelling.
Attending healthcare appointments.
Entering particular buildings.
Approaching animals.
Participating in education or employment.
These changes may improve independence and quality of life.
Strength: improvement can be tested
Therapists can measure:
Anxiety ratings.
Number of avoided situations.
Distance from the feared object.
Time spent in the situation.
Completion of the hierarchy.
Follow-up functioning.
This makes treatment outcomes relatively clear and measurable.
Limitation: short-term improvement may not last
A client may complete a hierarchy successfully but later experience a return of fear.
This might occur when:
Exposure in everyday life differs from therapy.
The client stops practising relaxation.
A new frightening event occurs.
Treatment relied heavily on therapist support.
Only imagined exposure was used.
Follow-up assessment is therefore essential.
Limitation: improvement may not generalise
A person might become comfortable with:
One particular calm dog.
but remain frightened of:
Other dogs.
Barking.
Unfamiliar animals.
Dogs moving quickly.
The hierarchy should include enough variation to help the new learning generalise.
Limitation: measuring fear is difficult
Fear is partly an internal experience.
A person may:
Enter the feared situation.
Appear calm.
Continue experiencing substantial anxiety.
Alternatively, a person may report low anxiety because they believe that is expected.
A combination of self-report and behavioural measures is more informative than either alone.
Limitation: therapy effects may have several causes
Improvement might result partly from:
Attention from the therapist.
Expectation that treatment will work.
Regular support.
Increased confidence.
Repeated practice.
This does not mean systematic desensitisation is ineffective.
It means that improvement cannot automatically be attributed only to reciprocal inhibition.
Evaluating appropriateness
What does appropriateness mean?
Appropriateness concerns whether the treatment is suitable for:
The particular client.
The particular phobia.
The person’s circumstances.
Ethical and practical requirements.
A treatment might be effective in principle but unsuitable for a particular person.
Strength: gradual exposure is less distressing
Systematic desensitisation begins with mildly anxiety-provoking situations.
The client is not immediately exposed to the most feared stimulus.
This may make the treatment:
More acceptable.
Less frightening.
Less likely to be refused.
Less likely to result in withdrawal.
More ethically manageable.
This is a major contrast with immediate exposure to the strongest fear.
Strength: the client has greater control
The hierarchy is created collaboratively.
The client can:
Discuss which steps feel manageable.
Practise relaxation.
Repeat stages.
Progress gradually.
Tell the therapist when a step is too difficult.
This may increase trust and engagement.
Strength: it can be individually tailored
The treatment can be adapted to:
The client’s exact triggers.
Their anxiety level.
Their preferred relaxation technique.
Practical goals.
The speed at which they progress.
Whether imagined or real exposure is used.
A personalised hierarchy is more likely to match the person’s actual difficulties.
Strength: it may suit clients unable to tolerate intense exposure
Some clients may find immediate exposure overwhelming.
Gradual treatment may be especially helpful when the person:
Has severe anxiety.
Has previously abandoned exposure.
Needs time to build confidence.
Would refuse flooding.
Benefits from a highly structured sequence.
Strength: relaxation skills may have wider value
The client may use relaxation techniques outside the specific phobia treatment.
They may apply them when facing:
Everyday stress.
Future hierarchy steps.
New but related situations.
Early signs of rising anxiety.
However, the treatment’s success should still be judged primarily by reduction of the phobia.
Limitation: it can be time-consuming
The treatment may require:
Several relaxation sessions.
Careful construction of a hierarchy.
Repetition of stages.
Gradual progression.
Real-life practice.
Follow-up appointments.
This may take longer than a more intensive behavioural treatment.
Limitation: longer treatment can increase cost
More sessions may create higher costs for:
The client.
Healthcare services.
Employers if time away from work is required.
Families supporting attendance.
The treatment may be appropriate emotionally but less convenient economically.
Limitation: it requires commitment
The client may need to:
Attend regularly.
Practise relaxation.
Complete tasks between sessions.
Face increasing levels of anxiety.
Resist the urge to avoid.
Poor attendance or limited practice may reduce effectiveness.
Limitation: not every client finds relaxation easy
Some people may struggle to:
Slow their breathing.
Release muscular tension.
Visualise situations.
Remain focused.
Recognise when they are relaxed.
The therapist may need to adapt the technique.
Limitation: relaxation may become a safety behaviour
The client might conclude:
“I am safe only when I use this exact relaxation routine.”
This could create dependence on the technique.
A successful programme should help the person learn that the situation itself is manageable, not merely that relaxation prevents disaster.
Limitation: some phobias are more complex
Systematic desensitisation may be particularly suitable when:
The feared stimulus is identifiable.
A clear hierarchy can be constructed.
Exposure can be arranged safely.
It may be more difficult to use when fear involves:
Many changing social situations.
Several different triggers.
Complex beliefs about judgement or humiliation.
Risks that cannot be reproduced easily.
No clear sequence of exposure steps.
The treatment may then need to be adapted or combined with methods addressing cognition.
Ethical considerations
Informed consent
The client should understand:
What exposure involves.
That anxiety may increase temporarily.
How the hierarchy will be used.
The role of relaxation.
Their right to discuss concerns.
Protection from harm
Treatment deliberately introduces feared situations.
The therapist should:
Begin at an appropriate level.
Avoid forcing rapid progression.
Monitor distress.
Ensure that real-life exposure is safe.
Use professional judgement.
Right to withdraw
The client should not be coerced into continuing.
However, leaving every time anxiety rises may reinforce avoidance.
The therapist must balance:
Respect for the client’s choices.
Encouragement to remain in a manageable exposure situation.
Client dignity
The phobia should not be mocked or dismissed.
The therapist should recognise that:
The fear feels real.
The client may already feel embarrassed.
Insight does not remove anxiety.
Progress may be uneven.
Systematic desensitisation compared with flooding
Systematic desensitisation | Flooding |
Exposure is gradual | Exposure begins at a very high level |
Uses an anxiety hierarchy | Does not require gradual progression |
Includes relaxation training | Does not depend on relaxation training |
May take several sessions | May be completed more rapidly |
Usually less distressing | Usually more intensely distressing |
May have lower refusal or withdrawal | Greater risk that clients will refuse or leave |
Often more expensive because it takes longer | May be less expensive if fewer sessions are needed |
Gives the client greater sense of control | Requires willingness to tolerate intense anxiety |
Neither treatment is automatically best for everyone.
Appropriateness depends on:
The client.
The phobia.
The severity of anxiety.
Previous treatment experiences.
Time and cost.
Willingness to continue exposure.
Systematic desensitisation and the two-process model
Systematic desensitisation can be understood as reversing processes described by the two-process model.
Classical-conditioning link
The phobic stimulus has become associated with fear.
Systematic desensitisation forms a new association:
Phobic stimulus + relaxation
Operant-conditioning link
Avoidance has been negatively reinforced because it removes anxiety.
During treatment, the client:
Approaches rather than avoids.
Remains in the situation.
Experiences anxiety falling without escape.
This weakens the avoidance cycle.
Treatment support for behavioural principles
Successful treatment suggests that:
Learned associations can change.
Avoidance is important.
Exposure can reduce fear.
New responses can be learned.
However, treatment success does not prove that every phobia was originally caused by conditioning.
A therapy may reduce symptoms even when the original cause was different.
Appropriateness for different clients
Client who fears distress
A person who refuses flooding may accept systematic desensitisation because the first steps are mild.
Client with a clear specific phobia
A clear stimulus such as:
A dog.
A needle.
A lift.
A particular journey.
can often be arranged into a straightforward hierarchy.
Client with several triggers
A person with many different fears may require:
More than one hierarchy.
Longer assessment.
Additional therapeutic methods.
More flexible treatment.
Client who cannot access the stimulus easily
Some feared situations are difficult or expensive to reproduce.
For example:
Air travel.
Particular weather conditions.
Rare animals.
Imaginal exposure may be used initially, although real-life practice may still be needed for full generalisation.
Client with health considerations
Relaxation and exposure should be planned with the client’s health and safety in mind.
Exposure should never involve genuine unnecessary danger.
The aim is to approach a feared but suitably safe situation, not to expose the client to actual harm.
Applying systematic desensitisation to scenarios
Scenario 1: fear of lifts
Zara avoids every lift and uses stairs, even when this makes her late.
A treatment programme could include:
Teaching controlled breathing.
Constructing a hierarchy.
Beginning with a photograph of a lift.
Progressing to standing near a lift.
Entering with the doors open.
Travelling one floor with the therapist.
Travelling independently.
At each stage, Zara uses relaxation.
The lift is gradually counterconditioned so that it becomes associated with a calmer response.
Scenario 2: fear of dogs
Noah crosses the road whenever he sees a dog.
The hierarchy may progress from:
Looking at dog photographs.
Watching a dog through a window.
Standing far from a dog on a lead.
Standing closer.
Remaining beside the owner.
Touching a calm dog.
Noah moves upwards only when anxiety at the current stage is manageable.
Scenario 3: fear of flying
Aisha must fly for a family event but has avoided aircraft for several years.
Possible hierarchy steps include:
Reading about flights.
Looking at aircraft photographs.
Watching a flight video.
Visiting an airport.
Sitting inside a stationary aircraft or realistic training environment.
Completing a short flight.
Relaxation is practised throughout.
Because real aircraft exposure can be difficult and expensive, the practicality of each step requires careful planning.
Scenario 4: fear of needles
Jude cancels medical appointments.
A hierarchy might include:
Saying the word “needle”.
Viewing a drawing.
Viewing a photograph.
Watching a procedure.
Entering a clinic.
Sitting with medical equipment present.
Completing the necessary procedure.
The treatment would be especially valuable if it allows Jude to access important healthcare.
Scenario 5: fear of spiders
A client can look at a cartoon spider but panics when shown a photograph.
The jump between the two stages may be too large.
The therapist could insert smaller steps such as:
Looking at a very small photograph.
Looking at a blurred image.
Viewing the image from a distance.
Gradually moving it closer.
This illustrates why a hierarchy may need adjustment.
Interpreting treatment data
Suppose a psychologist records the following mean anxiety ratings.
The scale runs from 0, meaning no anxiety, to 10, meaning extreme anxiety.
Group | Before treatment | Immediately after treatment | Three-month follow-up |
Systematic desensitisation | 8.4 | 3.2 | 3.5 |
Waiting-list control | 8.1 | 7.6 | 7.4 |
A careful interpretation would consider:
Whether anxiety fell more in the treatment group.
Whether improvement continued at follow-up.
Whether the groups were comparable before treatment.
How anxiety was measured.
Whether behavioural avoidance also changed.
Whether participants were randomly allocated.
Whether the sample represents people with different phobias.
The figures alone do not show why the treatment worked.
They also do not prove that every client will improve.
Evaluating evidence for treatment
Control groups
A waiting-list or alternative-treatment group helps establish whether improvement exceeds:
Natural recovery.
Repeated assessment.
Expectation effects.
Changes occurring over time.
Without comparison, reduced anxiety cannot confidently be attributed to systematic desensitisation.
Random allocation
Randomly allocating participants helps reduce pre-existing differences between groups.
Without random allocation, people choosing systematic desensitisation may be:
More motivated.
Less severely affected.
More confident about exposure.
These differences could influence outcomes.
Standardisation and individualisation
Treatment research faces an interesting problem.
A highly standardised hierarchy makes participants easier to compare.
However, systematic desensitisation is designed to be individualised.
One standard hierarchy may not represent every client’s anxiety.
Researchers must balance:
Experimental control.
Personalised treatment.
Self-report measures
Anxiety questionnaires provide access to private emotional experience.
However, they may be affected by:
Social desirability.
Demand characteristics.
Different interpretations of rating scales.
Behavioural measures
A behavioural test may examine how close the person can approach the feared stimulus.
This provides observable evidence.
However, visible approach does not always mean that anxiety has disappeared.
The strongest assessment combines several measures.
Building an examination answer
Outline question
For a brief outline, include the three central stages:
Relaxation training.
Anxiety hierarchy.
Gradual exposure while relaxed.
Add reciprocal inhibition or counterconditioning where marks allow.
Explanation question
Explain why each step reduces fear.
Do not simply list the procedure.
For example:
The client learns relaxation because this response is incompatible with intense anxiety. The relaxation response is then paired with increasingly threatening hierarchy items, counterconditioning the phobic stimulus.
Application question
Use the exact phobia in the scenario.
A generic sentence such as:
“The client creates a hierarchy.”
may receive limited application credit.
A stronger sentence would be:
“Nina might first look at a drawing of a spider, then view a photograph and eventually remain near a real spider while using controlled breathing.”
Evaluation question
Address both:
Effectiveness.
Appropriateness.
Effectiveness asks whether it works.
Appropriateness asks whether it is suitable.
Extended-response structure
A strong extended response could follow this order:
Define systematic desensitisation.
Explain relaxation training.
Explain the anxiety hierarchy.
Explain gradual exposure.
Explain reciprocal inhibition.
Explain counterconditioning.
Apply the procedure to a phobia.
Discuss evidence of symptom and behavioural improvement.
Evaluate client acceptability.
Discuss time and cost.
Compare briefly with flooding.
Discuss individual differences and complex phobias.
Reach a balanced conclusion.
A balanced assessment
Systematic desensitisation has several important strengths:
It has a clear behavioural rationale.
It uses a structured procedure.
It is gradual and generally less distressing than immediate exposure.
It can be tailored to individual clients.
Its outcomes can be measured behaviourally.
It may restore access to important everyday activities.
However:
It can take considerable time.
Multiple sessions may increase cost.
It requires motivation and practice.
Some clients find relaxation difficult.
Improvements may not generalise automatically.
Complex phobias may involve beliefs that exposure alone does not fully address.
Fear may return after treatment.
The most justified conclusion is:
Systematic desensitisation is an appropriate and potentially effective treatment for many phobias, particularly when a clear hierarchy can be created and the client prefers gradual exposure. Its success depends on careful individualisation, active participation and evidence that improvement transfers into everyday life.
Common Mistakes ⚠️
Mistake: Describing systematic desensitisation as immediate exposure
Why this is incorrect:
Systematic desensitisation uses gradual exposure through an ordered hierarchy.
How to improve:
Explain that the client begins with the least frightening item and progresses upwards.
Mistake: Forgetting relaxation training
Why this is a major omission:
Relaxation is paired with each hierarchy stage and is central to reciprocal inhibition.
How to improve:
Describe how the client learns and practises a specific relaxation technique before exposure.
Mistake: Saying the therapist creates the hierarchy alone
Why this is inaccurate:
The client’s own anxiety determines which situations are most frightening.
How to improve:
Explain that the hierarchy is constructed collaboratively.
Mistake: Treating the hierarchy as a list of random situations
Why this is incorrect:
The items must be ranked according to anxiety.
How to improve:
State that exposure moves from least to most anxiety-provoking.
Mistake: Beginning with the most feared item
Why this confuses systematic desensitisation with flooding:
Systematic desensitisation begins gradually.
How to improve:
Reserve immediate high-intensity exposure for the flooding lesson.
Mistake: Saying reciprocal inhibition means the person is distracted
Why this is incomplete:
The client remains exposed to the phobic stimulus while producing an incompatible relaxation response.
How to improve:
Explain that relaxation inhibits or competes with anxiety.
Mistake: Describing counterconditioning as forgetting the fear
Why this is inaccurate:
The treatment develops a new association between the stimulus and relaxation.
How to improve:
Explain the replacement or competition between conditioned responses.
Mistake: Saying the client moves upwards while still extremely anxious
Why this is inappropriate:
Progress normally occurs once the current stage is manageable.
How to improve:
Explain that stages may be repeated or divided into smaller steps.
Mistake: Saying the hierarchy must be identical for every person
Why this is incorrect:
People with the same phobia may fear different situations or features.
How to improve:
Describe the treatment as individually tailored.
Mistake: Assuming real exposure is always used immediately
Why this is inaccurate:
Treatment may begin with imagination, images or videos.
How to improve:
Distinguish imaginal and real-life exposure.
Mistake: Saying relaxation alone treats the phobia
Why this is incomplete:
Relaxation must be paired with exposure to the feared stimulus.
How to improve:
Describe the full sequence of relaxation, hierarchy and gradual exposure.
Mistake: Describing only the procedure in an explanation question
Why this limits marks:
An explanation should show why the procedure reduces anxiety.
How to improve:
Use reciprocal inhibition and counterconditioning.
Mistake: Saying negative reinforcement is part of the treatment
Why this is misleading:
Negative reinforcement primarily explains why avoidance maintains the phobia.
How to improve:
Explain that treatment aims to interrupt negatively reinforced avoidance.
Mistake: Claiming the treatment always works
Why this is too absolute:
Outcomes differ between clients and phobias.
How to improve:
Use evidence-based, cautious wording such as “may reduce” or “is appropriate for many clients”.
Mistake: Treating immediate improvement as proof of lasting success
Why this is incorrect:
Fear may return after treatment.
How to improve:
Discuss follow-up evidence and generalisation.
Mistake: Evaluating effectiveness and appropriateness as identical
Why this is incorrect:
A therapy may work but still be unsuitable for a particular person.
How to improve:
Evaluate effectiveness and suitability separately.
Mistake: Saying gradual treatment is always cheaper
Why this is usually incorrect:
Multiple sessions can make systematic desensitisation more expensive than a shorter intensive treatment.
How to improve:
Discuss the relationship between treatment length and cost.
Mistake: Saying the therapy is completely distress-free
Why this is inaccurate:
The client still faces feared situations and may experience some anxiety.
How to improve:
Describe it as less intensely distressing than immediate exposure, not free from distress.
Mistake: Using a generic hierarchy in an application question
Why this loses application credit:
The steps must relate to the particular person and phobia.
How to improve:
Use the named stimulus and evidence from the scenario.
Mistake: Describing treatment without a real-life goal
Why this weakens evaluation:
Reduced anxiety during imagination may not improve everyday functioning.
How to improve:
Explain how the client will eventually face a meaningful practical situation.
Exam-Style Questions ✍️
Question 1
Which one of the following is a central component of systematic desensitisation?
A. Immediate exposure to the most feared stimulus
B. Gradual exposure through an anxiety hierarchy
C. Challenging irrational beliefs through logical disputing
D. Increasing avoidance until anxiety disappears
[1 mark]
reveal mark scheme and indicative content
Answer: B. Gradual exposure through an anxiety hierarchy
Question 2
Define reciprocal inhibition in the context of systematic desensitisation.
[2 marks]
reveal mark scheme and indicative content
Mark scheme
AO1 = 2
2 marks:Â Clear definition referring to replacing anxiety with an incompatible response, usually relaxation.
1 mark:Â Limited or partial definition.
Indicative content
Anxiety and relaxation are treated as incompatible responses.
If the client remains relaxed while encountering the feared stimulus, the anxiety response should be inhibited.
Example answer
Reciprocal inhibition is the idea that two incompatible responses cannot occur fully at the same time, so relaxation is used to inhibit the anxiety produced by a phobic stimulus.
Systematic desensitisation specifically pairs gradual exposure with relaxation on the basis that intense anxiety and relaxation are incompatible
Question 3
Outline how an anxiety hierarchy is constructed.
[3 marks]
reveal mark scheme and indicative content
Mark scheme
AO1 = 3
Award 1 mark each for:
Identifying situations involving the phobic stimulus.
Ranking these situations according to the amount of anxiety they produce.
Arranging them from the least anxiety-provoking to the most anxiety-provoking situation.
Indicative content
The hierarchy should be relevant to the individual's particular phobia and allow exposure to progress gradually.
Example answer
The therapist and client identify different situations involving the feared stimulus. These are rated according to how much anxiety they cause and arranged into a hierarchy, beginning with the least frightening situation and ending with the most frightening.
Question 4
Explain the role of relaxation training in systematic desensitisation.
[4 marks]
reveal mark scheme and indicative content
Mark scheme
AO1 = 4
Award 1 mark for each relevant point, up to 4 marks.
Indicative content
The client learns a relaxation technique before exposure begins.
Techniques might involve controlled breathing or muscle relaxation.
Relaxation is used while the client encounters each stage of the hierarchy.
Through reciprocal inhibition, relaxation inhibits the anxiety response.
Repeated pairing of the phobic stimulus with relaxation produces counterconditioning.
Example answer
The client first learns relaxation techniques such as controlled breathing. They use these techniques while being gradually exposed to items on the anxiety hierarchy. Relaxation is incompatible with intense anxiety, so reciprocal inhibition reduces the fear response. Over time, the feared stimulus becomes associated with relaxation rather than anxiety through counterconditioning.
Question 5
Holly has a severe fear of dogs. She can look at a drawing of a dog but becomes anxious when shown a photograph and refuses to enter parks.
Describe how a therapist could construct and use an anxiety hierarchy to treat Holly.
[6 marks]
reveal mark scheme and indicative content
Mark scheme
AO2 = 6
Award credit for effective application of the hierarchy and gradual exposure.
Indicative content
The therapist would identify dog-related situations that produce different levels of anxiety.
Looking at a drawing could be placed near the bottom because Holly can already tolerate it.
Looking at photographs could come next because these produce anxiety.
Later stages might involve watching a dog from a distance or entering a park where dogs are present.
The most feared stage might involve standing near or interacting with a calm dog.
Holly would practise relaxation and progress through the hierarchy only when she can remain relaxed at the current stage.
Example answer
The therapist would construct a hierarchy of dog-related situations with Holly. Looking at a drawing might be near the bottom because she can already tolerate this. A photograph could come next, followed by watching a dog from a distance, entering a park and eventually standing close to a calm dog. Holly would use relaxation techniques at each stage and would only progress when she could experience the current stage with manageable anxiety.
Question 6
A client learns controlled breathing before imagining a feared lift. The client later stands beside a lift, enters it with the therapist and eventually travels independently.
Explain how reciprocal inhibition and counterconditioning could reduce the client’s phobia.
[6 marks]
reveal mark scheme and indicative content
Mark scheme
AO2 = 6
Award up to 3 marks for reciprocal inhibition and 3 marks for counterconditioning.
Indicative content
Reciprocal inhibition
Controlled breathing produces relaxation.
Relaxation and intense anxiety are treated as incompatible responses.
Using relaxation while imagining or approaching the lift inhibits the fear response.
Counterconditioning
The lift was previously associated with anxiety.
It is gradually experienced while the client is relaxed.
Through repeated pairing, the lift becomes associated with relaxation or safety rather than fear.
Example answer
The client's controlled breathing produces relaxation. According to reciprocal inhibition, relaxation and intense anxiety are incompatible, so using the breathing technique while imagining and approaching the lift should reduce anxiety. Counterconditioning occurs because the lift, which was previously associated with fear, is repeatedly paired with relaxation. As the client progresses from imagining the lift to entering and travelling in it, a new association between the lift and a calm response can develop.
Question 7
A psychologist records the following mean anxiety ratings. The scale runs from 0, no anxiety, to 10, extreme anxiety.
Group | Before treatment | After treatment | Three-month follow-up |
Systematic desensitisation | 8.2 | 3.1 | 3.4 |
Waiting-list control | 8.0 | 7.5 | 7.3 |
Describe the pattern shown in the results. Explain one conclusion and one limitation of the data.
[6 marks]
reveal mark scheme and indicative content
Mark scheme
AO2/AO3 = 6
Award up to 2 marks for the pattern, 2 marks for a conclusion and 2 marks for a limitation.
Indicative content
Pattern
The systematic desensitisation group's anxiety falls substantially from 8.2 to 3.1.
Anxiety remains relatively low at follow-up, 3.4.
The waiting-list group changes only slightly, from 8.0 to 7.5 and then 7.3.
Conclusion
Systematic desensitisation appears more effective than simply waiting.
The improvement appears largely maintained three months later.
LimitationCredit one appropriately explained limitation, for example:
anxiety ratings are self-report measures and may be affected by subjectivity or demand characteristics
means conceal individual differences
the table does not show whether participants were randomly allocated
anxiety ratings alone do not show whether everyday avoidance or functioning improved.
Example answer
Anxiety in the systematic desensitisation group falls from 8.2 before treatment to 3.1 afterwards and remains low at 3.4 after three months. The waiting-list group shows only a small reduction, from 8.0 to 7.3. This suggests that systematic desensitisation is effective and that much of the improvement is maintained. However, the results rely on mean anxiety ratings, so they do not show whether every client improved or whether their everyday avoidance behaviour changed.
Question 8
Explain one reason why systematic desensitisation may be more appropriate than flooding for some clients.
[4 marks]
reveal mark scheme and indicative content
Mark scheme
AO3 = 4
Award credit for one clearly developed reason.
Indicative content
Systematic desensitisation uses gradual exposure rather than immediate exposure to the most feared stimulus.
Anxiety can therefore remain at a more manageable level.
Clients have greater control over the pace of treatment.
This may make the treatment more acceptable and reduce refusal or withdrawal.
The comparison materials emphasise that systematic desensitisation generally produces more manageable anxiety and allows more gradual client control than flooding.
Example answer
Systematic desensitisation may be more appropriate because exposure is gradual rather than immediately confronting the client's strongest fear. This makes anxiety more manageable and gives the client greater control over progress. As a result, clients who would refuse or withdraw from flooding may be more willing to complete systematic desensitisation.
Question 9
Discuss the effectiveness and appropriateness of systematic desensitisation as a treatment for phobias.
[8 marks]
reveal mark scheme and indicative content
Mark scheme
Suggested allocation: AO1 = 3, AO3 = 5
7 to 8 marks:Â Knowledge of systematic desensitisation is accurate and detailed. Discussion of both effectiveness and appropriateness is thorough and effective. Specialist terminology is used appropriately.
5 to 6 marks:Â Knowledge is generally accurate and there is mostly effective discussion of effectiveness and appropriateness, although some points lack development.
3 to 4 marks:Â Some relevant knowledge is present, but discussion is limited or mainly descriptive.
1 to 2 marks:Â Very limited knowledge or discussion.
0 marks:Â No relevant content.
Indicative content
AO1
Behavioural treatment for phobias.
Client learns relaxation techniques.
Therapist and client construct an anxiety hierarchy.
Gradual exposure begins with the least feared situation.
Reciprocal inhibition means relaxation inhibits anxiety.
Counterconditioning replaces the learned fear response with a relaxation response.
AO3, effectiveness
Gradual exposure can reduce learned fear while preventing continued avoidance.
Treatment progress can be measured through reductions in anxiety and increased ability to approach the feared stimulus.
Improvement may not always generalise outside therapy, particularly when the person later faces the stimulus without therapist support.
Follow-up is important because immediate improvement does not necessarily demonstrate lasting effectiveness.
AO3, appropriateness
Gradual exposure usually produces less intense distress than flooding, making it more acceptable for clients who cannot tolerate immediate high-level exposure.
Clients have greater control because they progress through manageable stages.
However, systematic desensitisation can be time-consuming because relaxation must be learned and several stages of exposure completed.
It may therefore be more expensive than faster alternatives.
AQA also notes that it may be difficult to use for more generalised or "free-floating" fears where there is no obvious stimulus from which to construct a hierarchy.
Example answer
Systematic desensitisation is a behavioural treatment in which the client learns relaxation techniques and constructs an anxiety hierarchy. They then work gradually through increasingly feared situations while remaining relaxed. Through reciprocal inhibition and counterconditioning, the original anxiety response is replaced with a calmer response.
One strength is that the gradual nature of the treatment makes it relatively appropriate for clients who would find flooding too distressing. Clients can work through manageable stages and have greater control over the pace of treatment, which may make them more likely to complete it. However, the treatment can be time-consuming because relaxation training is required and several stages of the hierarchy may need to be repeated. Improvement may also fail to generalise outside therapy when the person encounters the feared stimulus without therapist support. In addition, systematic desensitisation can be difficult to apply to less clearly defined fears where constructing a hierarchy is difficult. Overall, it can be an effective and relatively acceptable treatment for specific phobias, although its suitability depends on the nature of the phobia and the individual client.
Question 10
Discuss systematic desensitisation as a behavioural treatment for phobias. Refer to an unfamiliar phobia in your answer.
[16 marks]
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