Y-BOCS (Yale-Brown Obsessive Compulsive Scale)

What is the Y-BOCS?

The Yale-Brown Obsessive Compulsive Scale (Y-BOCS) was developed by Wayne Goodman, Lawrence Price, Steven Rasmussen, and colleagues and published in 1989. It was specifically designed to measure the severity of obsessive-compulsive disorder (OCD) independently of the specific type or content of obsessions and compulsions, allowing consistent tracking across highly heterogeneous presentations, from contamination fears to symmetry obsessions to harm obsessions and checking rituals.

The Y-BOCS consists of 10 items divided into two subscales: five items rating obsessions and five items rating compulsions. Each item is rated 0 (none) to 4 (extreme) across five dimensions: time occupied, interference with functioning, distress, resistance, and perceived control. The Obsessions Subscale ranges from 0 to 20 and the Compulsions Subscale ranges from 0 to 20, giving a total possible score of 0 to 40. The scale is administered via structured clinical interview, which is typically preceded by a Y-BOCS Symptom Checklist to identify the patient's specific obsessions and compulsions.

The Y-BOCS is the universally accepted primary outcome measure in OCD clinical trials and is the standard against which newer OCD scales are validated. A 35% or greater reduction in total Y-BOCS score is the most commonly used definition of treatment response in clinical trials of cognitive-behavioral treatment and pharmacotherapy. It remains essential for both research and clinical measurement-based care in OCD.

Obsessions Subscale (O)

5 items: O1 time occupied by obsessions; O2 interference; O3 distress; O4 resistance; O5 control. Each rated 0–4. Subscale total 0–20.

Compulsions Subscale (C)

5 items: C1 time occupied by compulsions; C2 interference; C3 distress; C4 resistance; C5 control. Each rated 0–4. Subscale total 0–20.

Symptom Checklist (Optional)

The Y-BOCS Symptom Checklist (58 items) identifies the specific obsessions and compulsions present before scoring begins. Not scored but guides rating focus.

Y-BOCS Score Interpretation

Goodman et al. (1989). The total score is the sum of the Obsessions Subscale (0–20) and Compulsions Subscale (0–20). A 35% or greater total score reduction is the standard definition of treatment response in clinical trials.

Subscale Score Reference

Enter the Obsessions and Compulsions subscale totals from a completed Y-BOCS interview to calculate the total score and severity band.

The Five Y-BOCS Dimensions

Both the Obsessions and Compulsions subscales use the same five dimensions, each rated 0 (none) to 4 (extreme). This parallel structure allows direct comparison between obsessive and compulsive symptom burden.

Time Occupied

How much time per day is consumed by obsessions or compulsions? 0=none; 1=less than 1 hour/day; 2=1–3 hours; 3=3–8 hours; 4=more than 8 hours. Captures the overall symptom burden most directly.

Interference

How much do the symptoms interfere with social, occupational, or other functioning? 0=none; 1=slight; 2=definite impairment but manageable; 3=substantial impairment; 4=nearly incapacitating. Reflects functional impact.

Associated Distress

How much distress do the obsessions or compulsions cause? 0=none; 1=mild; 2=moderate; 3=severe; 4=near-constant, disabling distress. Distress ratings often diverge between obsessions and compulsions.

Resistance

How much does the patient try to resist? 0=always tries to resist; 4=completely gives in. Note that this dimension is reverse-scored in clinical interpretation, higher resistance effort means lower clinical concern, but higher ratings (less resistance) indicate greater severity.

Control

How much control does the patient have over the obsessions or compulsions? 0=complete control; 4=no control. Control captures the experienced sense of ability to resist or stop symptoms and tends to be highly sensitive to treatment change.

Track Y-BOCS Treatment Response Longitudinally in HiBoop

Automated subscale scoring, treatment response tracking, and clinical documentation for OCD patients, Y-BOCS alongside OCI-R and other measures in HiBoop.

Frequently Asked Questions

What does the Y-BOCS measure?

The Yale-Brown Obsessive Compulsive Scale (Y-BOCS) measures the severity of obsessive-compulsive disorder (OCD) symptoms independently of symptom content. It assesses both obsessions (unwanted, intrusive thoughts, images, or urges) and compulsions (repetitive behaviors or mental acts performed to reduce distress) across five dimensions each: time occupied per day, interference with functioning, associated distress, resistance, and degree of control. The scale was designed by Goodman et al. (1989) to capture true symptom severity, not just the presence or type of OCD symptoms, making it valid across the full spectrum of OCD presentations.

How is the Y-BOCS scored?

The Y-BOCS has 10 items organized into two subscales: Obsessions (O1–O5) and Compulsions (C1–C5). Each item is rated 0 (none) to 4 (extreme) using standardized anchor definitions. The Obsessions Subscale total is the sum of O1–O5 (range 0–20). The Compulsions Subscale total is the sum of C1–C5 (range 0–20). The Y-BOCS total is the sum of both subscales (range 0–40). A higher score indicates greater OCD severity. The five dimensions, time occupied, interference, distress, resistance, and control, are rated separately for obsessions and compulsions, allowing clinicians to identify asymmetric symptom profiles.

What is a good Y-BOCS score?

Lower scores indicate less severe OCD. A total Y-BOCS score of 0 to 7 is considered subclinical, consistent with remission or no clinically significant OCD. In clinical trials, remission is typically defined as a total score of 8 or below sustained over time. A score reduction of 35% or more from baseline is the standard definition of treatment response to ERP or SRI pharmacotherapy. Scores of 8–15 indicate mild OCD; 16–23 moderate; 24–31 severe; 32–40 extreme. Most participants enrolled in clinical trials have baseline scores in the moderate range (16–23).

How long does the Y-BOCS take to administer?

A complete Y-BOCS administration, including the Symptom Checklist and the 10-item interview, typically takes 20 to 30 minutes with an experienced clinician. The Symptom Checklist alone may take 10 to 15 minutes on first administration. On follow-up visits, when the target symptoms are already identified, the 10-item severity interview alone takes approximately 10 to 15 minutes. The Y-BOCS requires direct patient contact and clinician judgment, it cannot be scored from self-report alone, though a validated self-report version (OBQ or YBOCS-SR) exists for screening purposes.

Is the Y-BOCS only used in OCD?

The Y-BOCS was specifically designed and validated for OCD. It is the criterion-standard outcome measure in all major OCD clinical trials and treatment guidelines worldwide. Modified versions exist for related conditions: the Y-BOCS-II is an updated version with improved psychometric properties; the CY-BOCS is a children's version for pediatric OCD (ages 6–17); and related scales such as the YBOCS-BDD and HY-BOCS have been developed for body dysmorphic disorder and hoarding disorder. These related scales use similar five-dimension structures but are validated for their respective conditions.

Does HiBoop support the Y-BOCS?

Yes. HiBoop supports Y-BOCS administration and longitudinal tracking for clinicians treating OCD. Clinicians can record Obsessions and Compulsions subscale scores with automated total calculation, severity band labeling, treatment response percentage tracking, and trend visualization over time. Y-BOCS data in HiBoop can be tracked alongside the OCI-R and other anxiety-related measures, supporting complete OCD measurement-based care and treatment documentation consistent with clinical trial standards.

Additional Context

The Y-BOCS is the criterion-standard 10-item clinician-administered scale for measuring OCD severity. Two subscales, Obsessions and Compulsions, each assess time, interference, distress, resistance, and control on 0–4 anchors. Total score 0–40. Goodman et al. (1989).

The Yale-Brown Obsessive Compulsive Scale (Y-BOCS) was developed by Wayne Goodman, Lawrence Price, Steven Rasmussen, and colleagues and published in 1989. It was specifically designed to measure the severity of obsessive-compulsive disorder (OCD) independently of the specific type or content of obsessions and compulsions, allowing consistent tracking across highly heterogeneous presentations, from contamination fears to symmetry obsessions to harm obsessions and checking rituals.

The Y-BOCS consists of 10 items divided into two subscales: five items rating obsessions and five items rating compulsions. Each item is rated 0 (none) to 4 (extreme) across five dimensions: time occupied, interference with functioning, distress, resistance, and perceived control. The Obsessions Subscale ranges from 0 to 20 and the Compulsions Subscale ranges from 0 to 20, giving a total possible score of 0 to 40. The scale is administered via structured clinical interview, which is typically preceded by a Y-BOCS Symptom Checklist to identify the patient's specific obsessions and compulsions.

The Y-BOCS is the universally accepted primary outcome measure in OCD clinical trials and is the standard against which newer OCD scales are validated. A 35% or greater reduction in total Y-BOCS score is the most commonly used definition of treatment response in clinical trials of cognitive-behavioral treatment and pharmacotherapy. It remains essential for both research and clinical measurement-based care in OCD.

5 items: O1 time occupied by obsessions; O2 interference; O3 distress; O4 resistance; O5 control. Each rated 0–4. Subscale total 0–20.

5 items: C1 time occupied by compulsions; C2 interference; C3 distress; C4 resistance; C5 control. Each rated 0–4. Subscale total 0–20.

The Y-BOCS Symptom Checklist (58 items) identifies the specific obsessions and compulsions present before scoring begins. Not scored but guides rating focus.

Goodman et al. (1989). The total score is the sum of the Obsessions Subscale (0–20) and Compulsions Subscale (0–20). A 35% or greater total score reduction is the standard definition of treatment response in clinical trials.

Enter the Obsessions and Compulsions subscale totals from a completed Y-BOCS interview to calculate the total score and severity band.

Subscale Breakdown

Educational reference only. Cannot replace clinical evaluation or a full structured Y-BOCS interview.

Both the Obsessions and Compulsions subscales use the same five dimensions, each rated 0 (none) to 4 (extreme). This parallel structure allows direct comparison between obsessive and compulsive symptom burden.

How much time per day is consumed by obsessions or compulsions? 0=none; 1=less than 1 hour/day; 2=1–3 hours; 3=3–8 hours; 4=more than 8 hours. Captures the overall symptom burden most directly.

How much do the symptoms interfere with social, occupational, or other functioning? 0=none; 1=slight; 2=definite impairment but manageable; 3=substantial impairment; 4=nearly incapacitating. Reflects functional impact.

How much distress do the obsessions or compulsions cause? 0=none; 1=mild; 2=moderate; 3=severe; 4=near-constant, disabling distress. Distress ratings often diverge between obsessions and compulsions.

How much does the patient try to resist? 0=always tries to resist; 4=completely gives in. Note that this dimension is reverse-scored in clinical interpretation, higher resistance effort means lower clinical concern, but higher ratings (less resistance) indicate greater severity.

How much control does the patient have over the obsessions or compulsions? 0=complete control; 4=no control. Control captures the experienced sense of ability to resist or stop symptoms and tends to be highly sensitive to treatment change.

Automated subscale scoring, treatment response tracking, and clinical documentation for OCD patients, Y-BOCS alongside OCI-R and other measures in HiBoop.