Learning theories and phobias

Phobias are intense, irrational fears of specific objects or situations that can interfere with daily life. They can be acquired and treated through various learning processes.

Classical conditioning

Classical conditioning occurs when a neutral stimulus becomes associated with an unconditioned stimulus that naturally triggers a response, leading to a conditioned response to the neutral stimulus alone.

How classical conditioning explains phobias:

• This process creates expectancy learning, where the individual anticipates a negative event based on the association.
• For example, if a child sees a white rat (neutral stimulus) paired repeatedly with a loud noise (unconditioned stimulus) that causes fear (unconditioned response), the child may later show distress (conditioned response) at the sight of the rat (now a conditioned stimulus), as demonstrated in Watson and Rayner's 1920 study.

Evaluative learning

Evaluative learning is a form of classical conditioning where a strong emotional response, such as disgust, becomes linked to a previously neutral stimulus without any expectation of a specific event.

How evaluative learning works:

• The association leads to the stimulus evoking intense feelings, like revulsion.
• For instance, if someone touches a flower (neutral stimulus) and encounters a slimy worm (unconditioned stimulus) that causes disgust (unconditioned response), they might later feel sick (conditioned response) at similar flowers (conditioned stimulus).

Operant conditioning

Operant conditioning involves behaviours becoming more or less frequent based on their consequences: positive reinforcement increases a behaviour, while punishment decreases it.

Application to phobia treatment:

• This can be applied to phobia treatment by rewarding desired actions.
• For example, praising someone with a dog phobia for stroking a dog reinforces the idea that dogs are safe, encouraging the behaviour to occur more often.

Background to the study

Diagnosis of phobias

Phobias are identified by mental health professionals using standardised manuals, such as the DSM-5 (Diagnostic and Statistical Manual of Mental Disorders, Fifth Edition), published by the American Psychiatric Association in 2013. Diagnosis often involves semi-structured interviews to evaluate symptoms, including their severity and how long they have persisted.

Previous research

Earlier studies have shown that addressing disgust, alongside fear, can improve treatment outcomes.

Key findings:

• In adults with blood-injury phobias, targeting disgust has led to better results.
• Among children with spider phobias, reductions in fear have been accompanied by decreases in disgust.

This background highlights the potential role of disgust in phobias, which influenced the approach in this study.

Aims of the study

1. To determine the underlying cause of a nine-year-old boy's phobia of buttons.
2. To evaluate the effectiveness of cognitive-behavioural therapy, incorporating imagery exposure, for treating a phobia rooted in disgust.

Methodology of the study

This research used a detailed examination of a single case to gather in-depth insights over time.

Research method and design

The study was a case study, which involves an intensive investigation of an individual or small group. It employed a longitudinal design, tracking changes before, during, and after treatment, with follow-ups at 6 and 12 months.

Data collection techniques

Data was both quantitative (numerical and measurable) and qualitative (descriptive and interpretive) to provide a comprehensive view.

Quantitative data:

• A feelings thermometer, a psychometric rating scale from 0 (no distress) to 8 (extreme distress), measured the boy's subjective feelings of distress.
• Counts were made of buttons touched, held, or manipulated during sessions to track behavioural progress.

Qualitative data:

• A semi-structured interview gathered detailed information through guided questions.
• Observations during therapy sessions noted behaviours like approaching or avoiding buttons.

Sample

The sample consisted of one participant: a nine-year-old Hispanic-American boy from Florida, USA, referred to a clinic for his button phobia. He had no other disorders, such as obsessive-compulsive disorder (OCD). The sampling technique was opportunity sampling, where the participant was selected based on availability and relevance to the researchers' interests.

Procedure of the study

The procedure was divided into assessment and treatment phases, ensuring a structured approach to diagnosing and addressing the phobia.

Assessment of the phobia

Assessment methods used:

• The Anxiety Disorders Interview Schedule for DSM-IV-Child and Parent (ADIS-C/P) was used in a semi-structured interview to confirm the diagnosis.
• The feelings thermometer assessed symptom severity on a scale from 0 to 8.
• Potential triggers, such as past traumas, were explored to guide the treatment plan.

Treatment of the phobia

Treatment involved gradual exposure and cognitive techniques over multiple sessions.

Exposure sessions (sessions 1–4):

• Each session lasted 50 minutes, with 20 minutes including the boy's mother.
• The boy ranked 11 button-related stimuli from least to most distressing using the feelings thermometer.
• This created a disgust/fear hierarchy, a ranked list of feared items used in exposure therapy.
• He was gradually exposed to each stimulus in the hierarchy.
• Positive reinforcement, such as praise from his mother, was given for tolerating or touching buttons.

Disgust-related imagery exposure sessions (sessions 5–11):

• The boy imagined and described sensory aspects of buttons, like their appearance, smell, and texture.
• The therapist applied cognitive restructuring, which involves challenging and changing unhelpful thoughts to reduce emotional distress.

Post-treatment, the ADIS-C/P measured symptoms, with follow-ups at 6 and 12 months.

Ethical issues in the study

• Informed consent was obtained from both the mother and child to protect against psychological harm.
• However, details about the phobia's origin could compromise anonymity, potentially increasing the risk of emotional distress if privacy was breached.

Results of the study

The findings revealed the phobia's origins and tracked progress through treatment.

Cause of the phobia

The phobia started at age five after a distressing incident: the boy tipped a bowl of buttons over himself in kindergarten, in front of his class, from the teacher's desk. This led to ongoing difficulties, such as inability to touch buttons, trouble dressing, poor school concentration due to uniform buttons, and avoidance of buttoned clothing or people wearing buttons.

Progress during exposure therapy (sessions 1–4)

• Positive outcomes: The boy progressed through the entire disgust hierarchy and handled more buttons each session.
• Negative outcomes: Distress ratings on the feelings thermometer increased, and some hierarchy situations were rated higher after these sessions than before.

Progress during disgust-related imagery and cognitions (sessions 5–11)

The boy described buttons as "disgusting" and "gross," linking them to an unpleasant smell without further explanation.

Distress ratings decreased over time, for example:

• Imagining hundreds of buttons falling on his body dropped from 8 to 5 to 3.
• Hugging his mother wearing a shirt with buttons fell from 7 to 4 to 3.

Follow-up at 6 and 12 months

Assessments using the ADIS-C/P showed the boy no longer met phobia criteria. Buttons ceased to cause distress, and he wore his school uniform with small clear plastic buttons daily without problems.

Conclusions from the study

• Such phobias can be explained by evaluative learning, where strong emotions like disgust become associated with neutral stimuli.
• Treatment may need to combine imagery exposure and cognitive restructuring with traditional exposure therapy for effective results.

Evaluation of the study

Evaluating the study's strengths and weaknesses helps assess its value and limitations.

Issues and debates

This study raises broader questions about psychological research and its implications.

Application to everyday life

• Therapists treating disgust-based phobias should receive training in imagery exposure and cognitive restructuring.
• These methods could benefit clients who do not respond to standard exposure therapy.

Nature versus nurture

Nurture is supported, as therapeutic learning experiences altered the boy's behaviours and emotions. However, phobias may involve both: the disgust response has evolutionary value for avoiding harmful stimuli (nature), while evaluative learning helps adapt to specific threats (nurture interaction).

Use of children in psychological research

• Tools were adapted for children, such as the child version of the diagnostic interview, to improve validity.
• The feelings thermometer was designed to help the boy express distress levels in an age-appropriate way.