Children's Yale-Brown Obsessive Compulsive Scale
Children's Yale-Brown Obsessive Compulsive Scale (CY-BOCS) · Also known as: CY-BOCS, Y-BOCS-Children
The Children's Yale-Brown Obsessive Compulsive Scale (CY-BOCS) is a 10-item clinician-administered semi-structured interview for assessing obsessive-compulsive symptoms in children and adolescents ages 6–17 years. Developed by Scahill, Riddle, and colleagues in 1997 as a child adaptation of the adult Y-BOCS, the CY-BOCS quantifies severity of obsessions and compulsions, insight, resistance, and functional impact. It is the gold-standard outcome measure in pediatric OCD research and clinical practice for diagnosis, severity rating, and treatment monitoring.
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When to use it
Primary uses: (1) Diagnostic assessment of OCD in children presenting with obsessions and compulsions; (2) severity rating at baseline to guide treatment intensity and track change over time; (3) outcome measurement in RCTs of cognitive-behavioral therapy or SSRI for pediatric OCD; (4) treatment monitoring every 4–8 weeks during active therapy to assess response and inform adjustments; (5) differential diagnosis (distinguishing OCD from ADHD, tics, anxiety disorders, autism-spectrum behaviors); (6) research on OCD natural history and subtypes in childhood.
Strengths & limitations
- Gold-standard OCD severity measure in pediatric research and clinical practice; used in >500 published studies.
- Excellent reliability and validity: inter-rater reliability (ICC) >0.90; correlation with other OCD measures (r >0.80).
- Sensitive to treatment change: decreases significantly with ERP or SSRI; small effect sizes detectable.
- Comprehensive assessment: captures obsessions, compulsions, resistance, insight, and functional impact in single brief interview.
- Developmental adaptation: items and language tailored for children; accounts for limited insight in pediatric OCD.
- Extensively validated across diverse child populations and OCD subtypes (contamination, harm, symmetry, sexual, religious).
- Norms available; allows comparison to OCD and non-OCD samples.
- Requires trained clinician; not self-administered. This limits feasibility in low-resource settings and high-volume primary care.
- Time and resource intensive compared to self-report screening measures; typical administration 15–30 minutes.
- Relies on child's ability and willingness to report obsessions. Some children minimize OCD due to shame or fear of judgment; parental collateral is essential.
- Does not assess all OCD domains equally: some children have purely mental compulsions (pure obsessions, ruminations) that are harder to quantify; CY-BOCS may underestimate severity.
- Insight and resistance items are subjective; clinician judgment needed. Inter-rater reliability on these items slightly lower (ICC ~0.80) than on time/interference items.
- Does not include tic-OCD specific items; children with comorbid tics may require supplementary tic assessment (Yale Global Tic Severity Scale).
Frequently asked
My child's CY-BOCS score is 18. Does this mean they have OCD and need medication?
A CY-BOCS score of 18 indicates moderate OCD and warrants treatment initiation. First-line treatments are cognitive-behavioral therapy with exposure and response prevention (ERP) and/or SSRI medication. Many children improve with ERP alone without medication; others benefit from combined treatment. Discuss with a pediatric psychiatrist or psychologist trained in OCD to decide on treatment plan.
Why are clinician-rated scores better than child self-report for OCD?
Clinician-rated scales like CY-BOCS allow systematic assessment of obsessions and compulsions through guided questions and behavioral observation. Children often minimize OCD symptoms due to shame, or lack insight into severity. Clinicians can probe details, ask open-ended questions, and observe behavioral avoidance. Parental input also adds perspective. Self-report scales exist (OCI-CV) but are less comprehensive than clinician interview.
My child's CY-BOCS decreased from 24 to 20 after 8 weeks of therapy. Is this improvement?
Yes, a decrease of 4 points is meaningful improvement (approximate effect size d=0.5). However, continued treatment is warranted—a score of 20 still indicates moderate OCD. Most guidelines recommend continuing ERP or medication adjustments until CY-BOCS drops to <10 (remission) or at least <15 (mild). Discuss progress with your therapist and consider intensifying treatment if plateau occurs.
Does a high CY-BOCS score mean my child will have OCD forever?
No. CY-BOCS measures current severity, not prognosis. With evidence-based treatment (ERP, SSRI), 60–70% of children show significant improvement. Some achieve remission (CY-BOCS <10). Factors predicting better prognosis: early age of treatment, high insight, supportive family, absence of comorbidities. Early intervention is associated with better long-term outcomes.
Sources
- Scahill, L., Riddle, M. A., McSwiggin-Hardin, M., Ort, S. I., King, R. A., Goodman, W. K., . . . Leckman, J. F. (1997). Children's Yale-Brown Obsessive Compulsive Scale: Reliability and validity. Journal of the American Academy of Child & Adolescent Psychiatry, 36(6), 844–853. DOI: 10.1097/00004583-199706000-00023 ↗
- Goodman, W. K., Price, L. H., Rasmussen, S. A., Mazure, C., Fleischmann, R. L., Hill, C. L., . . . Charney, D. S. (1989). The Yale-Brown Obsessive Compulsive Scale: Development, use, and reliability. Archives of General Psychiatry, 46(11), 1006–1011. DOI: 10.1001/archpsyc.1989.01810110048007 ↗
How to cite this page
ScholarGate. (2026, June 3). Children's Yale-Brown Obsessive Compulsive Scale (CY-BOCS). ScholarGate. https://scholargate.app/en/child-psychiatry/yale-brown-oc-children
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