The History and Evolution of ERP

Written By Eliane Nevares

Exposure and Response Prevention (ERP) has its roots in the development of behaviour therapy in the mid-20th century, particularly from classic and operant conditioning models of anxiety and fear. Just like other modalities in psychotherapy, ERP has also evolved over time.

Below you will find a brief outline of the history and evolution of ERP:

1950s-1960s: Early Behaviour Therapy Foundations

  • Joseph Wolpe, a South African psychiatrist, pioneered the use of systematic desensitization to treat phobias, based on classical conditioning. He showed that people could unlearn fear responses through gradual exposure.

  • Around the same time, psychologists began experimenting with exposure-based treatments for anxiety disorders, noting that avoidance of feared stimuli maintained if not intensified the associated fears.

1966: The First Controlled ERP Study

  • The first formal study of ERP for OCD was published by Victor Meyer, a British psychologist.

  • He treated two patients with OCD by preventing rituals while exposing them to feared stimuli (e.g., touching "contaminated" objects without washing hands).

  • Both patients improved significantly. This was a major breakthrough in the development of ERP.

1970s-1980s: Scientific Validation

  • Researchers like Edna Foa, Stanley Rachman, and Isaac Marks helped refine ERP protocols and confirmed its effectiveness for OCD and anxiety disorders through controlled clinical trials.

  • ERP became central in cognitive behavioural therapy (CBT) as a leading treatment for OCD, as cognitive theories and behavioural methods began to integrate.

1990s-2000s: Widespread Adoption and Guidelines

  • ERP was endorsed by major institutions like:

    • APA (American Psychological Association)

    • NICE (UK National Institute for Health and Care Excellence)

  • It became the gold-standard treatment for OCD.

  • Manuals and self-help resources became more available, such as those by Edna Foa and Jonathan Abramowitz.

2010s-Present: Modern Applications

  • ERP is now used alongside or integrated with:

    • Mindfulness and ACT (Acceptance and Commitment Therapy)

    • Inhibitory learning approaches that focus on tolerating uncertainty rather than habituation alone

  • It remains gold-standard treatment for OCD and is also being adapted for other conditions like PTSD and eating disorders.

If you are interested in scheduling a Discovery Call to learn more about ERP, feel free to be in touch directly. I look forward to speaking with you and supporting you in your healing journey!

Eliane Nevares
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