Phobias (AQA A-Level Psychology): Revision Notes

Behavioural Explanations of Phobias

Overview of the behavioural approach

The behavioural approach views phobias as learned responses acquired through environmental experiences rather than innate fears. This perspective focuses on observable behaviours and the learning processes that create and maintain phobic responses. The core principle is that if phobias can be learned, they can also be unlearned through appropriate interventions.

Behaviourists propose that phobias develop through association and learning experiences. Unlike biological explanations that focus on genetics or brain chemistry, the behavioural approach emphasises the role of environmental factors and conditioning processes in phobia development.

The two-process model

The two-process model provides a comprehensive framework for understanding phobias by explaining both their origins and persistence. This model combines two distinct learning processes:

1. The acquisition of phobias
2. The maintenance of phobias

Acquisition refers to how phobias initially develop, primarily through classical conditioning but also through social learning. This explains the onset of phobic responses when individuals encounter specific stimuli for the first time in a frightening context.

Maintenance describes how phobias persist over time, explained through operant conditioning. This process involves the reinforcement of avoidance behaviours that prevent the phobia from naturally diminishing.

Classical conditioning and phobia acquisition

Classical conditioning explains how neutral stimuli become fear-inducing through association with naturally frightening experiences. This process, first described by Ivan Pavlov in 1903, involves pairing a neutral stimulus with an unconditioned stimulus that naturally produces fear.

In phobia development, a neutral stimulus becomes a conditioned stimulus (CS) when paired with a frightening experience (unconditioned stimulus - UCS). The natural fear response unconditioned response (UCR) becomes associated with the previously neutral stimulus, creating a conditioned response (CR) of fear.

This process can occur through direct experience of trauma or indirectly through social learning, where individuals observe others experiencing fear in specific situations. Watching someone else being frightened by a stimulus can lead to the development of similar fear responses in the observer.

Operant conditioning and phobia maintenance

Operant conditioning explains how phobias persist through the consequences of avoidance behaviours. When individuals avoid feared stimuli or situations, they experience negative reinforcement - the removal of anxiety provides relief, making avoidance more likely to occur again.

This creates a problematic cycle where avoidance behaviours are constantly reinforced. Each time someone avoids their feared stimulus, the anxiety reduction serves as a reward, strengthening the avoidance response.

Supporting research evidence

Watson & Rayner (1920) - Little Albert study

Evaluation:

Strengths:

• Provided clear empirical evidence that human fears could be learned through conditioning
• Demonstrated fear generalisation, showing how phobias can extend to similar stimuli
• Used controlled laboratory conditions allowing for precise measurement of responses

Weaknesses:

• Highly unethical by modern standards - caused deliberate distress to an infant without consent
• Single case study limits generalisability to broader populations
• Albert was removed from the hospital before deconditioning could occur
• Ethical concerns raise questions about the validity of findings obtained through harmful methods

Additional supporting research

• Bagby (1922) documented a case study of a woman who developed a water phobia after her feet became stuck in rocks near a waterfall. Over time, she became increasingly distressed by running water sounds. Although eventually deconditioned, the neutral stimulus of water sounds had become associated with her initial panic, supporting classical conditioning principles.
• King et al. (1998) found that children commonly develop strong phobias following traumatic experiences, providing further evidence for the role of classical conditioning in phobia acquisition.
• Di Gallo (1996) reported that approximately 20% of people involved in serious car accidents develop travel phobias. The study found that individuals began making avoidance responses such as staying home rather than travelling, which were negatively reinforced through anxiety reduction, supporting operant conditioning principles.

Evaluation of behavioural explanations

Strengths

• Empirical support: The behavioural approach is supported by substantial research evidence, including controlled laboratory studies and real-world case studies that demonstrate conditioning principles in phobia development.
• Treatment effectiveness: The success of behavioural treatments such as systematic desensitisation provides strong support for behavioural explanations. If phobias are learned through conditioning, their successful treatment through counter-conditioning supports the underlying theory.
• Combination with other approaches: Behavioural explanations can be effectively combined with biological factors to provide a more complete understanding. The concept of genetic vulnerability suggests some individuals may be more susceptible to developing phobias through environmental experiences.
• Comprehensive explanation: The two-process model explains both phobia development and persistence, addressing the full cycle of phobic disorders rather than just their origins.

Weaknesses

• Incomplete explanation: Rachman (1984) proposed the safety signals hypothesis, arguing that avoidance behaviours might be motivated by positive feelings associated with safe places rather than simply anxiety reduction. This suggests the two-process model may oversimplify maintenance mechanisms.
• Evolutionary factors: Bounton (2007) argues that the model neglects evolutionary influences, noting that avoidance responses may be learned more rapidly when they involve stimuli that posed threats to our ancestors' survival.
• Individual differences: Not everyone who experiences traumatic events develops phobias, suggesting that behavioural explanations alone cannot account for individual variations in susceptibility.
• Cognitive limitations: The approach focuses primarily on observable behaviours and may neglect the role of thought processes, beliefs, and cognitive biases that contribute to phobic responses.
• Methodological concerns: Much of the supporting research, particularly early studies like Little Albert, involved unethical procedures that raise questions about the validity and applicability of findings.