What you'll learn

• How classical conditioning can explain the acquisition of a phobia.
• How operant conditioning can explain the maintenance of a phobia through avoidance.
• How social learning theory explains phobias learned by observing others.
• How to evaluate learning explanations using evidence, ethics and real-world applications.

Starting point: what is a phobia?

A phobia is more than a dislike or ordinary fear. It is an intense, persistent fear of an object, situation or activity that leads to avoidance and disrupts everyday life.

For example, someone with a dog phobia may cross the road to avoid dogs, stop visiting friends with pets, or feel panic even when seeing a dog on television.

What do learning theories assume?

Learning theories explain behaviour as something acquired through experience. In this topic, the key idea is that phobias are not necessarily “born” in a person — they may be learned through association, consequences, or observation.

Learning theories are mainly behaviourist, meaning they focus on observable behaviour rather than unconscious thoughts or biological causes.

The diagram below shows the three main learning routes you need for this topic.

Acquisition: learning the fear

Acquisition means how the phobia is first learned. Learning theories usually explain acquisition through classical conditioning and/or social learning theory.

Classical conditioning: learning by association

Classical conditioning is learning by association. A person learns to associate a previously neutral stimulus with something frightening or unpleasant.

This idea comes from behaviourist research such as Pavlov’s work with dogs, where dogs learned to associate a bell with food. In phobias, the association is usually between a neutral object or situation and a frightening event.

The key terms

A neutral stimulus is something that does not originally cause fear. For example, a dog may be neutral before a person has a bad experience.

An unconditioned stimulus is something that naturally causes a response without learning, such as being bitten.

An unconditioned response is the natural reaction to the unconditioned stimulus, such as fear or pain after being bitten.

After repeated or powerful association, the neutral stimulus becomes a conditioned stimulus. It now triggers fear by itself.

The fear response is then called a conditioned response because it has been learned.

Stimulus generalisation

Stimulus generalisation happens when the fear spreads to similar stimuli. For example, someone bitten by a large black dog may later fear all dogs, barking sounds, parks, or even dog leads.

This helps explain why phobias can become wider and more disruptive over time.

Watson and Rayner: Little Albert

A classic piece of evidence for classical conditioning is Watson and Rayner’s Little Albert study (1920). They conditioned an infant, Albert, to fear a white rat by pairing the rat with a loud frightening noise. Albert later showed fear towards the rat and similar white fluffy objects.

This supports the idea that fear can be learned through association. However, it is a very ethically problematic study.

Under the BPS Code of Ethics and Conduct (2009), psychologists must consider consent, right to withdraw, protection from harm, confidentiality and debriefing. Little Albert could not give informed consent, was deliberately distressed, and was not properly desensitised afterwards.

Maintenance: why the phobia continues

Maintenance means why the phobia persists over time. The key learning explanation here is operant conditioning.

Operant conditioning: learning through consequences

Operant conditioning is learning through consequences. If a behaviour is followed by a rewarding consequence, it is more likely to happen again.

In phobias, the important behaviour is usually avoidance.

For example, a person with a lift phobia avoids lifts and takes the stairs. Their anxiety quickly decreases. This reduction in anxiety acts as a reward, so they are more likely to avoid lifts again.

This is called negative reinforcement.

Negative reinforcement does not mean punishment. It means something unpleasant is taken away. In phobias, the unpleasant thing removed is usually anxiety.

Mowrer’s two-process model

Mowrer’s two-process model (1947) combines classical and operant conditioning.

It says phobias are:

• Acquired through classical conditioning.
• Maintained through operant conditioning.

This is a strong AO1 point because it clearly separates how the phobia starts from why it continues.

Extinction: why avoidance is a problem

Extinction occurs when the conditioned stimulus is repeatedly experienced without the feared outcome, so the fear response weakens.

For example, if someone gradually spends time near calm dogs without being bitten, the association between dogs and danger may reduce.

Avoidance blocks this process. If the person never goes near dogs, they never gather evidence that dogs can be safe.

Social learning theory: learning by observing others

Not all phobias begin with a direct frightening experience. Some may be learned by watching other people.

Social learning theory, associated with Bandura (1977), argues that people learn behaviours by observing and imitating models, especially people they identify with, such as parents, siblings or peers.

In phobias, a child might observe a parent screaming around spiders and learn that spiders are dangerous.

Modelling and vicarious reinforcement

Modelling means demonstrating a behaviour that another person may imitate.

Vicarious reinforcement means learning from the consequences another person receives. For example, if a parent avoids a dog and then receives comfort, attention, or relief, a child may learn that avoidance is useful.

Bandura’s Bobo doll study (1961) was not about phobias, but it supports the broader idea that children can imitate observed behaviour. Research by Mineka and Cook (1984) found that monkeys could acquire fear of snakes by observing other monkeys reacting fearfully, which is more directly relevant to phobias.

AO3: strengths of learning explanations

They explain both acquisition and maintenance

A major strength of Mowrer’s two-process model is that it explains why phobias persist. Classical conditioning alone explains how fear begins, but operant conditioning explains why avoidance continues.

This is useful because many phobias last for years, even when the person knows the fear is irrational.

They have practical applications

Learning theories have led to effective treatments, especially systematic desensitisation and flooding.

Both are based on the idea that avoidance maintains fear. By safely exposing the person to the feared stimulus, the fear response can weaken through extinction.

This gives learning theories strong real-world value.

They are supported by evidence

Watson and Rayner’s Little Albert study supports classical conditioning, while Mineka and Cook’s monkey research supports observational learning. These studies show that fear can be learned through association and observation.

However, use this evidence carefully: supporting evidence does not mean the theory explains every case.

AO3: limitations of learning explanations

Not everyone has a traumatic learning experience

Many people with phobias cannot remember a direct conditioning event. For example, someone may have a severe snake phobia without ever being bitten by a snake.

This challenges a purely classical conditioning explanation.

Preparedness may matter

Preparedness, linked to Seligman (1971), is the idea that humans may be biologically prepared to develop fears of things that were dangerous in our evolutionary past, such as snakes, spiders, heights or darkness.

This may explain why some phobias are more common than others. We are more likely to fear spiders than plug sockets, even though plug sockets may be more dangerous in modern life.

So, learning may interact with biological predispositions.

The theory can be reductionist

A reductionist explanation oversimplifies behaviour by focusing on one level of explanation. Learning theories focus mainly on behaviour and experience, but phobias may also involve cognition, genetics, temperament and brain processes.

For example, cognitive explanations would focus on irrational beliefs, attentional bias and catastrophic thinking.

Ethical and methodological issues in evidence

Little Albert is often used as evidence, but it has major ethical and methodological weaknesses. It involved harm, lacked valid consent, and was based on one child, so generalisability is limited.

This weakens the evidence base if it is used too heavily.

How to write this in an essay

For AO1, describe the learning process accurately using the correct terms: neutral stimulus, unconditioned stimulus, conditioned stimulus, negative reinforcement, modelling and vicarious reinforcement.

For AO2, apply the explanation to the specific phobia in the scenario. If the question is about a dog phobia, keep linking each point back to dogs, bites, barking, avoidance and reduced anxiety.

For AO3, evaluate with evidence, applications and limitations. A strong paragraph might say that the two-process model is useful because it explains both acquisition and maintenance, but it may be incomplete because not all phobias follow a clear traumatic event.