OCI-R accuracy OCD test
How accurate is the OCI-R?
Short answer: the OCI-R is a well-validated screening tool — good at flagging who should have a fuller evaluation, not at handing out a diagnosis. It was developed by Foa et al. in 2002 and has been tested against clinical interviews in independent studies. Strong internal consistency and a validated cutoff, covering the main OCD symptom dimensions.
Measured a total of 21 or higher suggests probable OCD warranting evaluation.
What the numbers mean
Sensitivity is how often the test correctly flags people who do have the condition; specificity is how often it correctly clears those who don't. High figures on both mean the OCI-R misses few real cases while raising few false alarms — which is exactly what you want from a first-pass screen.
The honest limits
No screening tool is perfect, and self-administration online adds its own caveats:
- It measures distress over the past month — symptoms fluctuate.
- Intrusive thoughts occur in many conditions; context matters.
- It flags likely OCD for assessment; it does not diagnose it.
Does taking it online change the accuracy?
The questions and scoring here are identical to the clinical version, so the instrument itself is unchanged. What differs is context: a clinician also weighs your history, rules out other causes, and interprets borderline scores. That's why every result here points you toward a professional rather than standing in for one. Reproducing the instrument faithfully is our job; diagnosing is theirs.