How phobias are learned and unlearned (background substance)
Classical conditioning can create a phobia (fear or disgust); exposure and cognitive/evaluative techniques can remove it.
This case study only makes sense once you understand how the learning approach explains phobias — the part textbooks usually compress.
Phobias can be learned by classical conditioning. A neutral stimulus (buttons) becomes associated with a distressing experience, turning into a conditioned stimulus that triggers a conditioned response (fear/disgust). The classic demonstration is 'Little Albert' (Watson & Rayner), where a child learned to fear a white rat paired with a loud noise. In this case study, the boy's phobia started at age 5 around a distressing button-related event.
Fear vs disgust — and 'evaluative learning'. Not all phobic responses are fear. Some are disgust — a 'yuck' reaction. Evaluative learning is when our like/dislike (evaluation) of something changes through association. The boy's response to buttons became increasingly one of disgust, not just fear — which matters for treatment.
How phobias are unlearned:
- Exposure / systematic desensitisation — gradually facing the feared stimulus (often via a fear hierarchy, from least to most distressing) while staying calm, so the conditioned response extinguishes.
- Operant elements — rewarding brave behaviour (positive reinforcement) supports progress.
- Cognitive restructuring — changing the negative thoughts about the stimulus; combined with exposure, this can tackle disgust specifically.
The key insight of this study: if a phobia is maintained by disgust, then a treatment that only reduces fear may not work — you must target the disgust too.
- Classical conditioning can create a phobia (NS → CS → CR), e.g. 'Little Albert'.
- Phobic responses can be FEAR or DISGUST; evaluative learning changes like/dislike.
- Unlearning: exposure / fear hierarchy (extinction) + reward + cognitive restructuring.
- Key insight: treating only fear fails if DISGUST maintains the phobia.