Discuss flooding as a behavioural treatment for phobias

Question 10 Mark Scheme

Discuss flooding as a behavioural treatment for phobias. In your answer, compare flooding with systematic desensitisation.

[16 marks]

What is expected in the answer?

The command word “discuss” requires students to explain how flooding works and then evaluate its effectiveness and appropriateness as a treatment for phobias. The instruction to compare flooding with systematic desensitisation means students must make explicit similarities and differences between the treatments, rather than writing two separate descriptions.

The current specification requires both flooding and systematic desensitisation, with relaxation and a hierarchy specified as features of systematic desensitisation. Students are also expected to evaluate treatments in terms of their appropriateness and effectiveness.

Marks for this question: AO1 = 6, AO3 = 10

As this is an original 16-mark discussion question with no scenario requiring application, an appropriate allocation is AO1 = 6 and AO3 = 10.

Level	Marks	Description
4	13–16	Knowledge of flooding as a behavioural treatment is accurate and generally well detailed. Discussion of its effectiveness and appropriateness is thorough and effective. Comparison with systematic desensitisation is explicit and well developed. The answer is clear, coherent and focused, with effective use of specialist terminology.
3	9–12	Knowledge of flooding is evident but there may be occasional inaccuracies or omissions. Discussion is mostly effective and there is relevant comparison with systematic desensitisation, although some points may lack development.
2	5–8	Limited knowledge of flooding is present. The response is mainly descriptive. Discussion is only partly effective and comparison with systematic desensitisation may consist mainly of separate descriptions.
1	1–4	Knowledge is very limited or muddled. Flooding may be confused with systematic desensitisation. Discussion and comparison are limited, poorly focused or absent.
0	0	No relevant content.

Indicative content

AO1: Flooding

Credit relevant knowledge such as:

• Flooding is a behavioural treatment for phobias.

• The client is exposed immediately to a highly feared stimulus or situation.

• Unlike systematic desensitisation, exposure is not gradually increased through an anxiety hierarchy.

• Exposure is prolonged.

• The client is encouraged to remain in the feared situation rather than using their normal avoidance or escape response.

• Anxiety is initially likely to be very high.

• With continued safe exposure:

  • the feared outcome does not occur;

  • anxiety eventually decreases;

  • avoidance becomes unnecessary;

  • the learned fear response may weaken.

• Flooding may involve in vivo exposure, using the real feared stimulus, or imaginal exposure where direct exposure is impractical.

These features are consistent with the supplied flooding revision material, which describes flooding as immediate, high-intensity and prolonged exposure with prevention of avoidance.

Prolonged exposure and extinction

Credit relevant explanation such as:

• A phobic stimulus may have become a conditioned stimulus through classical conditioning.

• During flooding, the conditioned stimulus is repeatedly or continuously experienced without the feared harmful event.

• The conditioned fear response can therefore weaken through extinction.

• The person learns that the stimulus does not reliably predict danger.

• The original frightening memory does not necessarily disappear.

• Instead, new learning develops in which the phobic stimulus is experienced without the expected negative consequence.

The supplied revision material explicitly links prolonged flooding with extinction of the conditioned fear response.

Breaking the avoidance cycle

Flooding can also be linked to operant conditioning.

Before treatment:

phobic stimulus → anxiety → escape → anxiety decreases → escape is negatively reinforced

During flooding:

phobic stimulus → anxiety → no escape → continued exposure → anxiety eventually decreases without avoidance

The person therefore learns that escaping is not necessary for anxiety to fall.

This directly challenges the negatively reinforced avoidance that can maintain phobias according to the two-process model.

Preparation and consent

Credit relevant knowledge such as:

• Flooding should be carefully planned rather than sprung on an unprepared client.

• The therapist should assess:

  • the nature and severity of the phobia;

  • the client's usual avoidance behaviour;

  • whether exposure can be arranged safely;

  • whether the client is suitable for intense exposure.

• Informed consent is particularly important because flooding deliberately produces high anxiety.

• The client needs to understand:

  • that anxiety is likely to rise sharply;

  • why continued exposure is necessary;

  • possible alternatives such as systematic desensitisation.

• The feared situation must be psychologically threatening to the client but should not involve genuine danger.

These preparation and consent issues are described explicitly in the supplied flooding materials.

Systematic desensitisation

For comparison, credit relevant knowledge such as:

• Systematic desensitisation is also a behavioural exposure treatment.

• The client learns relaxation techniques.

• The therapist and client construct an anxiety hierarchy.

• The client begins with a relatively mild fear and gradually progresses towards more anxiety-provoking situations.

• Exposure is therefore gradual rather than immediate.

• The client attempts to remain relaxed while encountering each stage.

The specification explicitly identifies relaxation and hierarchy as features of systematic desensitisation.

Direct comparison between flooding and systematic desensitisation

Systematic desensitisation	Flooding
Gradual exposure	Immediate high-intensity exposure
Uses an anxiety hierarchy	Does not require gradual progression through a hierarchy
Begins with a mildly feared situation	Begins with a highly feared situation
Uses relaxation training	Does not depend on relaxation training
Anxiety is kept relatively manageable	High anxiety is deliberately produced initially
Gradual progression may take several sessions	May produce improvement in fewer sessions
Usually gives the client more gradual control	Requires tolerance of intense anxiety
May be more acceptable	May produce greater refusal or withdrawal
May require more therapist time	May be cheaper if completed rapidly

Both treatments:

• are behavioural therapies;

• involve exposure;

• reduce opportunities for avoidance;

• allow the client to encounter the feared stimulus without the expected harmful outcome;

• aim to weaken learned fear.

These comparisons are set out in the supplied flooding material.

AO3: Discussion and evaluation

Flooding directly tackles avoidance

A major strength is that flooding prevents the client from relying on avoidance.

Avoiding a phobic stimulus normally reduces anxiety, negatively reinforcing the avoidance behaviour.

During flooding, the person instead remains exposed until anxiety decreases without escape.

This gives flooding a clear behavioural rationale because it directly targets one of the mechanisms that can maintain a phobia.

By comparison, systematic desensitisation also reduces avoidance, but does so gradually through increasingly difficult stages.

Flooding may work relatively quickly

An important advantage over systematic desensitisation is speed.

Flooding does not require the client to:

• learn relaxation first;

• construct and gradually complete many hierarchy stages.

The person confronts a high level of fear immediately, meaning improvement may potentially occur in fewer sessions.

This could be particularly valuable where a phobia seriously interferes with:

• employment;

• travel;

• medical treatment;

• education;

• everyday independence.

By contrast, the June 2022 mark scheme identifies systematic desensitisation as potentially time-consuming because relaxation training and gradual exposure may take many sessions.

Flooding may be more cost-effective

If flooding works in fewer sessions, it can require less overall therapist time.

This could reduce:

• appointment costs;

• travel costs;

• time away from work or education.

Systematic desensitisation may cost more because relaxation training and gradual progression through an anxiety hierarchy can require repeated sessions.

However, flooding is not automatically cheaper. If a client withdraws and later requires another form of treatment, any initial cost advantage could disappear.

Therefore:

flooding may be more economical if completed successfully, whereas systematic desensitisation may prove better value when it produces greater treatment completion.

Flooding may be less acceptable to clients

A major limitation is the intensity of distress.

Flooding deliberately exposes a person to something they fear intensely. Anxiety may initially rise sharply before it begins to decrease.

Some clients may therefore:

• refuse treatment;

• withdraw before treatment begins;

• leave during exposure;

• avoid returning for further sessions.

Systematic desensitisation may be more appropriate for these clients because exposure is gradual and anxiety is kept at more manageable levels.

This highlights an important distinction between effectiveness and appropriateness. A treatment can potentially work very quickly but still be of little practical use to a client who finds it unacceptable.

Early withdrawal could reinforce the phobia

Leaving a flooding session too soon creates a particular behavioural problem.

If the client escapes while anxiety is high:

escape → anxiety falls → escape is negatively reinforced

The person has repeated the very avoidance cycle that flooding is supposed to break.

They also fail to experience:

• anxiety decreasing while remaining in the situation;

• the feared outcome failing to occur.

Therefore, flooding depends heavily on the client being sufficiently motivated to remain engaged with exposure.

This is less problematic in systematic desensitisation because each hierarchy stage is selected to be relatively manageable.

Ethical concerns

Flooding raises more significant ethical concerns than systematic desensitisation because it deliberately produces intense psychological distress.

This makes:

• informed consent;

• careful assessment;

• protection from harm;

• the client's right to withdraw

particularly important.

The therapist cannot simply physically prevent a client from leaving. The client must understand the rationale and agree to continued exposure.

Systematic desensitisation is generally easier to justify ethically because exposure is gradual and the client has greater control over progression.

However, if flooding is fully explained, safely conducted and freely chosen, temporary anxiety may be justified by a substantial therapeutic benefit.

Systematic desensitisation may be more tolerable

Systematic desensitisation provides clients with a more gradual route towards confronting their fear.

For example, someone afraid of dogs might progress from:

photograph → video → dog at a distance → standing near a dog → touching a calm dog

Flooding might instead begin with prolonged exposure to a calm real dog.

The systematic desensitisation client therefore has opportunities to develop confidence progressively.

This may lead to greater treatment acceptability, although the disadvantage is that treatment usually takes longer.

Both treatments have a behavioural rationale

A strength shared by both treatments is their clear relationship with learning theory.

Both:

• expose the person to the phobic stimulus;

• prevent continued avoidance;

• provide experience of the stimulus without the predicted harmful event;

• aim to weaken the learned fear response.

The difference lies primarily in how exposure is introduced.

Systematic desensitisation pairs gradual exposure with relaxation, whereas flooding relies on prolonged high-intensity exposure without requiring a competing relaxation response.

This means the treatments share a behavioural objective while using very different routes to achieve it.

Improvement may not generalise

A limitation affecting exposure treatments is whether improvements transfer beyond the exact treatment situation.

For example, a person successfully flooded using one calm dog might remain afraid of:

• unfamiliar dogs;

• larger breeds;

• barking;

• dogs running freely in a park.

Likewise, someone may cope with the therapist present but continue avoiding the stimulus independently.

The supplied material identifies limited generalisation as a potential weakness and recommends exposure across varied stimuli and everyday settings.

This means effectiveness should be judged by changes in real-life behaviour, not simply reduced anxiety during a treatment session.

The June 2022 mark scheme makes a similar point for systematic desensitisation, noting that progress in therapy may not generalise outside the clinical setting.

Flooding may be more suitable for some clients and phobias

Flooding may be particularly appropriate where:

• the phobic stimulus is clearly identifiable;

• safe real-life exposure can be arranged;

• the client wants rapid treatment;

• the client is motivated and fully informed;

• intense exposure can be tolerated.

It may be less appropriate where the client:

• is unwilling to experience high anxiety;

• has previously abandoned exposure;

• prefers greater control over progression;

• has circumstances making intense arousal inappropriate.

Systematic desensitisation may be preferable when a gradual approach is needed.

Therefore, neither treatment is automatically "better". Appropriateness depends partly on the individual client.

Systematic desensitisation also has limitations

Although systematic desensitisation may be easier to tolerate, it is not without disadvantages.

The June 2022 mark scheme identifies:

• the time required for relaxation and gradual exposure;

• possible failure to generalise beyond therapy;

• difficulties using a hierarchy for more generalised or free-floating phobias;

• expense

as relevant limitations.

This means comparison should be balanced. Flooding's intensity is a disadvantage, but systematic desensitisation's slower and more complex procedure can also reduce its practicality.

Example answer

Flooding is a behavioural treatment for phobias in which the person is exposed immediately to a highly feared stimulus or situation for a prolonged period. Unlike systematic desensitisation, the client does not begin with mild exposure and gradually move through an anxiety hierarchy.

During flooding, the person's anxiety is likely to become very high. However, they remain in the situation rather than carrying out their normal avoidance or escape behaviour. The expected harmful event does not occur and anxiety eventually decreases. Through repeated or prolonged exposure, the conditioned fear response can weaken through extinction.

Flooding also tackles the operant conditioning that may maintain a phobia. Normally, a person sees the phobic stimulus, becomes anxious and escapes. Because leaving reduces anxiety, escape is negatively reinforced. During flooding, the person remains in the situation until anxiety falls without escape. They therefore learn that avoidance is not necessary for anxiety to decrease.

Systematic desensitisation is also a behavioural exposure therapy, but the procedure is different. The client learns relaxation techniques and constructs an anxiety hierarchy from least to most feared situations. They gradually work through the hierarchy while remaining relaxed. Flooding therefore uses immediate high-intensity exposure, whereas systematic desensitisation uses gradual exposure combined with relaxation.

One advantage of flooding is that it may work more quickly. The client does not need to spend time learning relaxation or progressing through several stages of a hierarchy. This means flooding may require fewer sessions than systematic desensitisation. A faster treatment may be particularly useful when a phobia is seriously disrupting someone's daily life.

Fewer sessions could also make flooding more cost-effective because less therapist time is required. Systematic desensitisation may take considerably longer because each stage of the hierarchy may have to be repeated before the client progresses. However, flooding is only economically advantageous if the person completes treatment. If they withdraw because the experience is too distressing and later require another therapy, it may actually become less cost-effective.

A major limitation of flooding is that it deliberately produces intense anxiety. Some people seeking treatment for a severe phobia may refuse to confront their greatest fear immediately. Others might begin treatment but withdraw before their anxiety decreases. Systematic desensitisation may therefore be more appropriate because its gradual hierarchy gives the client greater control and keeps anxiety at more manageable levels.

Withdrawal from flooding could be particularly problematic because leaving the situation immediately reduces anxiety. This would negatively reinforce escape and could maintain or even strengthen avoidance. Successful flooding therefore depends on the client remaining with the feared stimulus for long enough for anxiety to decrease.

There are also ethical concerns. Because intense psychological distress is part of flooding, the client must give informed consent and understand exactly what the procedure involves. The therapist should not expose someone unexpectedly to their fear or physically prevent them from leaving. Systematic desensitisation generally produces less intense distress, so it may be more ethically acceptable for some clients.

However, both treatments have a clear behavioural rationale. Both expose the person to the feared stimulus and reduce avoidance. The important difference is that systematic desensitisation does this gradually and pairs exposure with relaxation, whereas flooding confronts a high level of fear immediately and relies on prolonged exposure.

Neither treatment necessarily guarantees that improvement will generalise. A person treated successfully with one particular dog might remain frightened of other dogs or still avoid dogs when the therapist is absent. Treatment effectiveness should therefore be assessed in everyday situations rather than simply during therapy.

Overall, flooding can be an effective and relatively rapid treatment for a clearly defined phobia when the client understands the procedure and is able to tolerate intense exposure. Its potential advantages over systematic desensitisation are speed and lower cost, but these are balanced by greater distress and a higher risk that the client will refuse or abandon treatment. Systematic desensitisation is slower but may be more appropriate for clients who need a gradual and less distressing approach. The most suitable treatment therefore depends on the individual and the nature of their phobia.

Indicative mark: 16/16

Examiner-style commentary

This would be a strong Level 4 response because the student explains the mechanism of flooding rather than simply saying that the client "faces their fear".

The AO1 includes:

• immediate high-intensity exposure;

• prolonged exposure;

• prevention of avoidance;

• reduction in anxiety;

• extinction of conditioned fear;

• disruption of negatively reinforced escape behaviour.

The comparison with systematic desensitisation is also explicit throughout. The student repeatedly uses genuine comparisons:

flooding is immediate, whereas systematic desensitisation is gradual

flooding does not depend on relaxation, whereas systematic desensitisation does

flooding may be faster, whereas systematic desensitisation may be more tolerable

This is much stronger than describing flooding for half the essay and systematic desensitisation for the other half.

There was no flooding-specific examiner commentary identified in the supplied examiner reports. The closest directly relevant examiner guidance comes from the June 2022 question on systematic desensitisation. Examiners stressed that simple evaluative labels needed clear elaboration. For example, saying that a treatment is "time-consuming" was not enough. Stronger responses explained this through relaxation training, multiple sessions and gradual progression through the hierarchy.

That principle applies equally well here. A student should not simply write:

"Flooding is quicker but more stressful."

They should explain:

flooding begins with intense exposure and does not require relaxation training or movement through multiple hierarchy stages → fewer sessions may be required → therefore it may be faster and cheaper than systematic desensitisation.

And:

immediate confrontation produces intense anxiety → some clients may refuse or withdraw → systematic desensitisation may be more acceptable because exposure is gradual → therefore flooding may be less appropriate despite potentially working more quickly.

How a weaker answer could be improved

A weaker response might say:

"Flooding exposes someone to their fear. Systematic desensitisation uses a hierarchy. Flooding is faster but more stressful."

All of those statements are relevant, but they lack enough psychological explanation.

For stronger AO1:

phobic stimulus → intense anxiety → continued exposure without escape → feared event does not occur → anxiety eventually falls → conditioned fear weakens and avoidance is no longer reinforced.

For stronger comparison:

both therapies use exposure and aim to reduce avoidance, but systematic desensitisation introduces exposure gradually while pairing it with relaxation, whereas flooding begins immediately with a highly feared stimulus and does not depend on relaxation training.

For stronger evaluation:

flooding may require fewer sessions → potentially saves therapist time and money → however, intense anxiety may increase refusal or dropout → therefore systematic desensitisation may be more appropriate even though it takes longer.

The key is to make the comparison part of the evaluation, not an extra paragraph added at the end.