What is the difference between 'In Vivo' and 'In Vitro' exposure in Systematic Desensitisation?

In Vivo involves actual physical exposure to the feared object or situation, while In Vitro involves imagining the feared stimulus. In Vivo is typically more effective for long-term recovery, but In Vitro is useful when real-life exposure is impractical or too distressing initially.

How does Systematic Desensitisation differ from Flooding in terms of patient experience?

SD is a gradual process where the patient moves through a hierarchy of fear at their own pace, maintaining low anxiety. Flooding involves immediate and prolonged exposure to the most feared stimulus, causing high initial anxiety until the response is exhausted.

Compare the ethical considerations of Systematic Desensitisation versus Flooding.

SD is generally considered more ethical because it is less traumatic and gives the patient more control over the process. Flooding can be highly distressing and carries a higher risk of the patient quitting the treatment early, which can actually worsen the phobia.

What is a common error when constructing an anxiety hierarchy?

A common error is making the jumps between steps too large or not specific enough. If the steps are too steep, the patient may become overwhelmed by anxiety, breaking the reciprocal inhibition and stalling the therapeutic progress.

What happens if a patient moves to the next level of the hierarchy before they are fully relaxed?

The therapy may fail because the fear response has not been successfully replaced by relaxation. This can reinforce the phobic association rather than extinguishing it, as the patient is still experiencing anxiety in the presence of the stimulus.

Why is it a mistake to skip the relaxation training phase of SD?

Without relaxation training, the patient has no competing response to inhibit the anxiety. The treatment would simply become 'exposure therapy,' which lacks the specific counter-conditioning mechanism that makes SD unique and effective.

Define 'Reciprocal Inhibition' in the context of phobia treatment.

Reciprocal inhibition is the idea that two opposing emotions cannot exist at the same time. In SD, this means that if a person is deeply relaxed, it is physiologically impossible for them to feel intense fear or anxiety simultaneously.

What is 'Counter-conditioning'?

Counter-conditioning is a behavioral therapy technique where a new response is learned to a stimulus that previously triggered an unwanted response. In SD, the goal is to replace the fear response with a relaxation response through classical conditioning.

What is an 'Anxiety Hierarchy'?

An anxiety hierarchy is a list of situations related to a phobia, ranked by the patient from the least to the most anxiety-provoking. It provides a structured sequence for gradual exposure during the therapy sessions.

Define 'Progressive Muscle Relaxation'.

It is a technique used in SD where the patient is taught to tense and then release different muscle groups in the body. This helps the patient recognize the difference between tension and relaxation and achieve a state of deep physical calm.

Behavioural Approach to Treating Phobias: Systematic Desensitisation | AQA AS-Level Psychology

Behavioural Approach to Treating Phobias: Systematic Desensitisation

Summary

Systematic Desensitisation (SD) is a behavioral therapy based on classical conditioning principles designed to reduce phobic anxiety through gradual exposure. It operates on the premise of counter-conditioning, where a patient learns to associate a feared stimulus with relaxation rather than fear, effectively replacing the maladaptive response with a functional one.

1. Definition & Core Concepts

Systematic Desensitisation (SD) is a behavioral therapy developed by Joseph Wolpe, primarily used to treat simple phobias by gradually reducing the anxiety response to a specific stimulus.
The core mechanism is Counter-conditioning, which involves learning a new response (relaxation) to the phobic stimulus that was previously associated with fear.
This process relies on the principle of Reciprocal Inhibition, the biological impossibility of experiencing two opposite emotional states, such as extreme anxiety and deep relaxation, simultaneously.
By pairing the phobic stimulus with relaxation, the original 'fear' bond is broken and replaced by a 'calm' bond, leading to the extinction of the phobia.

A staircase diagram representing the Anxiety Hierarchy, showing steps from low to high anxiety with a red arrow indicating the progression of exposure.

2. Underlying Principles

Classical Conditioning Basis: SD views phobias as learned behaviors acquired through association; therefore, they can be 'unlearned' by creating a new association.
Reciprocal Inhibition: This is the physiological foundation of the therapy, stating that the nervous system cannot be in a state of 'fight or flight' (sympathetic) and 'rest and digest' (parasympathetic) at the same time.
Gradualism: Unlike other methods that use immediate high-intensity exposure, SD uses a slow, controlled approach to ensure the patient's anxiety levels remain manageable throughout the process.

3. The Three-Step Methodology

1. The Anxiety Hierarchy

The patient and therapist collaborate to create a list of situations related to the phobic stimulus, ranked from least to most frightening. This hierarchy serves as a roadmap for the treatment process.

2. Relaxation Training

The patient is taught various relaxation techniques, such as progressive muscle relaxation, deep breathing exercises, or mental imagery of peaceful scenes. The goal is for the patient to achieve a state of deep calm on command.

3. Gradual Exposure

The patient is exposed to the phobic stimulus starting at the bottom of the hierarchy while practicing relaxation. They only move to the next level once they can remain completely relaxed at the current level.

4. Key Distinctions

5. Exam Strategy & Tips

6. Common Pitfalls & Misconceptions