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What is Exposure and Response Prevention (ERP) Therapy?

Roamers Therapy I October 2026

Obsessive-compulsive disorder (OCD) is a mental health condition that involves unwanted, recurring thoughts, images, or urges (obsessions) and repetitive behaviors or mental rituals (compulsions) that a person feels the need to do, often to ease the anxiety or discomfort these thoughts bring. Because obsessions can feel too overwhelming and distressing, the temporary relief that compulsions bring can make them feel rewarding to our brains, reinforcing the urge to keep doing them and making it harder to break the cycle. One approach that can help break this cycle between obsessions and compulsions, and make OCD more manageable, is a treatment technique called Exposure and Response Prevention (ERP) Therapy.

What is the obsession-compulsion cycle in OCD?

People who experience OCD often find themselves having unwanted thoughts, visual images, or impulsive urges. These thoughts or images, called “obsessions,” are not always observable to other people, and they can bring a lot of distress and overwhelm to the person who experiences them.

Often, people who experience OCD may restore a sense of safety and release the fear or anxiety produced by their obsessive thoughts by avoiding certain things. In addition, people may also carry out certain behaviors or actions called compulsions as a reaction to their obsessive thoughts, images, or impulses. 

Compulsions can be observable by others, such as checking whether we turned off kitchen appliances multiple times, or they can be more internal, such as repeating certain words to ourselves. Avoidance and compulsions often bring a person experiencing obsessions a feeling of “neutralization” by making them feel that they are preventing a negative consequence or reducing the threat their obsessive thoughts include. Similarly, compulsions temporarily calm the distressing feelings, including a sense of anxiety and fear caused by obsessions.

The temporary relief compulsions bring can make them very rewarding for our brains, motivating us to keep doing them and leaving us stuck in the cycle. However, compulsions are often very rigid and time-consuming themselves, and they only bring temporary relief without helping to eliminate obsessions altogether or letting the anxiety and fear they produce to naturally subside. This is why it is very common to experience a lot of distress and overwhelm throughout the obsession-compulsion cycle when one experiences OCD.

One important approach that is often found helpful in breaking the cycle between obsessions and compulsions and making our experience with OCD more manageable is a treatment technique called Exposure and Response Prevention (ERP).

How does Exposure and Response Prevention (ERP) work?

ERP is a technique that has its roots in cognitive and behavioral research conducted in the 1960s about learning and fear reduction. It involves gradually getting exposed to what is feared in obsessions (exposure) and letting the negative emotions occur, such as fear and anxiety, while simultaneously refraining from compulsions (response prevention). This way, our brains learn that the situation in our obsessions may not be truly dangerous, or that the negative emotions we experience are manageable even if we don’t perform compulsions, which helps the negative emotions caused by obsessions subside.

ERP is often applied in various settings, from outpatient to inpatient, and commonly at a weekly frequency. Initially, the therapist and client would ideally spend adequate time to:

  • Conduct an assessment, including obsessional thoughts and impulses and what triggers them, avoidance or compulsions, what is expected to happen if compulsions are not performed, and more.
  • Provide psychoeducation, where therapists help clients understand how OCD affects them, as well as how ERP works, which can help clients experience more autonomy and benefit from the following ERP steps.
  • Plan the ERP treatment collaboratively, including creating a list of exposure exercises, some of which can also be used between sessions as homework.
  • Implement ERP across 12 to 20 exposure trials, the length and frequency of which can be individualized to the client’s unique needs

The implementation of ERP includes the following components:

  • In vivo exposure: Clients get exposed to feared or distressing situations. This is often carried out in a hierarchical manner, where the degree and intensity of the feared situation gradually increase. However, it is often started with a situation that triggers a moderate level of anxiety and fear (instead of a low level, which may not generate adequate learning), before moving on to more distressing situations.
  • Imaginal exposure: With ERP, exposure doesn’t always have to be concrete; it can also involve imagining feared situations and refraining from the response in this imagined scenario. Often, this process can be supported by recorded audio guides or written scripts that involve feared situations. Both in-vivo and imaginal exposure is often repeated for different contexts so that we can generalize our learning to different types of situations.
  • Response prevention: An essential part of ERP is that once we are exposed to a feared situation included in our obsessions, either directly or through imagination, we should lean into the uncomfortable feelings and refrain from avoiding the situation or performing compulsions so that our brains learn a sense of safety, reducing the uncomfortable feelings produced by obsessions naturally.

Through these planned exposure and response prevention exercises, the anxiety and fear we experience from our obsessions can start going away, and the link between obsessions and compulsions can be weakened, which can make OCD symptoms feel more manageable over time. Just as with the specific components it includes, it is equally important to ensure that we plan these collaboratively with our therapist, that our autonomy is respected, and that our emotional safety is ensured by adjusting the pace of treatment to where we are and our levels of readiness, so that ERP can be an empowering and effective way to help us develop greater tolerance for otherwise uncomfortable and limiting experiences.

Takeaways

  • OCD involves a cycle of obsessions and compulsions, where compulsions bring temporary relief but reinforce the urge to keep doing them.
  • Exposure and Response Prevention (ERP) helps break this cycle by gradually facing feared situations and refraining from compulsions, allowing anxiety and fear to naturally subside.
  • ERP involves assessment, psychoeducation, and collaborative treatment planning, with exposure exercises tailored to the client’s unique needs.
  • ERP includes in vivo exposure, imaginal exposure, and response prevention, which help weaken the link between obsessions and compulsions and generalize learning across different contexts.
  • A trauma-informed approach emphasizes collaboration, autonomy, emotional safety, and adjusting the pace of treatment to the client’s readiness, making ERP a more empowering and effective process.

References

  • Abramowitz, Jonathan S., Steven Taylor, and Dean McKay, ‘Exposure-Based Treatment for Obsessive-Compulsive Disorder’, in David F. Tolin (ed.), The Oxford Handbook of Obsessive-Compulsive and Related Disorders. https://doi.org/10.1093/oxfordhb/9780190068752.013.19
  • Blakey, S.M., Reuman, L., Jacoby, R.J. and Abramowitz, J.S. (2017). Exposure Therapy. In The Wiley Handbook of Obsessive Compulsive Disorders (eds J.S. Abramowitz, D. McKay and E.A. Storch). https://doi.org/10.1002/9781118890233.ch31
  • Reid, J. E., Laws, K. R., Drummond, L., Vismara, M., Grancini, B., Mpavaenda, D., & Fineberg, N. A. (2021). Cognitive behavioral therapy with exposure and response prevention in the treatment of obsessive-compulsive disorder: A systematic review and meta-analysis of randomized controlled trials. Comprehensive Psychiatry, 106, 152223. https://doi.org/10.1016/j.comppsych.2021.152223
  • Racz, J. I., McKenzie, M. L., Bialocerkowski, A., & Farrell, L. J. (2023b). Exposure and response prevention treatment of obsessive-compulsive disorder. In Handbook of Child and Adolescent Psychology Treatment Modules: Personalized Care in Behavior and Emotion (pp. 131–150). https://doi.org/10.1016/b978-0-323-99613-6.00018-1
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This page is also part of the Roamers Therapy Glossary; a collection of mental-health-related definitions that are written by our therapists.

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