Which evidence-based therapy is most effective for OCD?

• A. Psychoanalytic therapy.
• B. Existential therapy.
• C. Exposure and Response Prevention (ERP), a form of CBT.
• D. Behavioral activation without exposure.

Answer: (C)

Exposure and Response Prevention (ERP), a form of CBT, is the therapy with the strongest evidence for OCD. ERP trains patients to face feared situations or intrusive thoughts (exposure) while refraining from performing the usual rituals or compulsions (response prevention). Over repeated sessions, the anxiety tied to obsessions decreases through habituation and cognitive changes, breaking the cycle that sustains OCD symptoms. This approach directly targets the core mechanism of OCD—the urge to perform rituals to relieve distress from obsessions—so patients gain lasting control over their behaviors.

Extensive research, including randomized controlled trials and meta-analyses, shows ERP produces the most substantial symptom reduction and higher remission rates compared with other therapies. It’s often recommended as a first-line treatment, sometimes alongside SSRIs when pharmacotherapy is also indicated. Other therapies like psychoanalytic or existential approaches lack the same robust evidence for OCD, and behavioral activation without exposure does not address the key avoidance and ritual components driving OCD symptoms.