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How One Psychologist Changed the Way We Understand OCD

22 August 2026·1 min read

Plain-language summary · 1 min read

Ever wonder where our modern understanding of OCD actually came from? This paper looks back at the work of Dr Jack Rachman, a psychologist whose ideas shaped how we think about and treat obsessive-compulsive disorder today. Rather than sticking with one fixed idea, Rachman kept updating his thinking as new research came in, building what we now call the cognitive-behavioural (CBT) model of OCD. The paper explains that this model has strong scientific support, and that CBT remains the most effective talking therapy we have for OCD.

Why does this matter if you're living with OCD? Because it means the treatment approach many psychologists use isn't guesswork — it's the result of decades of careful thinking and research being tested, questioned, and refined. It also matters because the paper is honest that we don't have all the answers yet. It points to areas needing more research, like how early attachment experiences might play a role, and why compulsions can be so hard to shake even when someone knows their fears aren't realistic.

OCD can feel isolating, but the science behind treating it keeps growing. If OCD is affecting your life, reaching out to a psychologist who understands this evidence-based approach can make a real difference.

Source paper

Purdon. Dr. Jack Rachman's contributions to our understanding and treatment of obsessive-compulsive disorder.