Is there an OCD test?
There is no online test that can tell you whether you have OCD — diagnosis is made by a clinician, in conversation, and no questionnaire replaces that. What questionnaires can do is narrow the question down: they show whether your experience has the shape of OCD, and they give you something concrete to bring to an appointment.
ERP you actually do, not just read about
Reading explains the mechanism. OpenStep is where you build the hierarchy, take one small step a day, and see what you have already done.
Download free for iPhoneLooking for the check itself rather than the explanation? The two-minute self-check is here.
What a test can and cannot do
A screening questionnaire sorts people into "worth looking at more closely" and "probably not". That is genuinely useful and it is all it does. It cannot separate OCD from generalised anxiety, from an eating disorder, from autistic routines, or from a habit that simply annoys you. Those distinctions come from a conversation with someone trained to have it.
Two things follow. A high score is not a diagnosis. A low score is not an all-clear, particularly if your obsessions are entirely mental and you have no visible rituals to report.
The five questions used to spot OCD
NICE guideline CG31 asks clinicians to put these directly to people they suspect may have OCD. They are short on purpose:
- Do you wash or clean a lot?
- Do you check things a lot?
- Is there any thought that keeps bothering you that you would like to get rid of but cannot?
- Do your daily activities take a long time to finish?
- Are you concerned about putting things in a special order, or are you very upset by mess?
A "yes" to any of them is a reason to look further, not a verdict. Notice that none of them ask how strange the thought was. Content is not what makes something OCD.
What actually makes it OCD
The disorder is a shape, not a subject. Every form of it — contamination, harm, symmetry, religion, relationships — runs the same loop:
An intrusive thought or urge arrives → it lands as distressing rather than as noise → you do something to make the distress go down (wash, check, review, seek reassurance, count, avoid) → relief arrives, briefly → the thought returns, sooner and louder.
Two more things are needed before it is a disorder rather than a quirk: it takes up real time — the conventional marker is more than an hour a day — or it interferes with work, study, or relationships.
Note the third step carefully. Compulsions do not have to be visible. Mental reviewing, silent praying, counting, and checking your own memory all count, and people who only do those often assume the label cannot apply to them.
Questionnaires you may run into
- OCI-R (Obsessive-Compulsive Inventory–Revised) — 18 items, self-report, widely used in research and clinics as a screener. It gives a rough score across six symptom areas.
- Y-BOCS (Yale-Brown Obsessive Compulsive Scale) — the standard severity measure. It is administered by a clinician and is used to track how severe symptoms are and whether treatment is working, after diagnosis. It is not a self-test, and versions of it floating around the web are not the instrument.
If you take something online, the honest way to read the result is: this suggests a conversation is worth having.
What to do with the answer
- In the UK: the NHS route is your GP, who can refer you into talking therapies; in most areas you can also self-refer to NHS talking therapies without going through a GP first.
- Anywhere: what a clinician needs from you is not a score. It is a description — what the thought is, what you do afterwards, how long it takes, and what you have stopped doing because of it. Writing that down before the appointment is more useful than any test result.
- If you are already sure enough to act: the treatment with the strongest evidence is exposure and response prevention, and you can start structuring it before anyone confirms anything.
The self-check on this site
OpenStep has a self-check that takes about two minutes. It asks about the loop, not about the content of your thoughts, and it does not score you against a threshold or call the result a diagnosis. Your answers stay in the browser.
It exists to answer one question — does what I have look like this pattern? — and to show you what a first ERP step would be if it does.
Common questions
Can an online test diagnose OCD?
No. Screening questionnaires indicate whether a closer look is warranted. Diagnosis is made by a clinician who can distinguish OCD from anxiety, trauma responses, eating disorders and autistic routines.
I have no rituals — can it still be OCD?
Yes. Compulsions are often entirely mental: reviewing a memory, silently praying, counting, or checking internally whether you still feel the same way. These are compulsions and they maintain the loop exactly as washing does.
How much is too much?
The conventional marker is more than an hour a day spent on obsessions and compulsions, or clear interference with work, study or relationships. Distress alone counts too — time is a guide, not a gate.
Turn this into daily practice.
Everything on this page stays free to read. The app is for the part a page cannot do — the repetition.
