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The Yale-Brown Obsessive Compulsive Scale. I. Development, use, and reliability.

W K Goodman1, L H Price, S A Rasmussen

  • 1Department of Psychiatry, Yale University School of Medicine, New Haven, CT 006508.

Archives of General Psychiatry
|November 1, 1989
PubMed
Summary

The Yale-Brown Obsessive Compulsive Scale offers a reliable measure for obsessive-compulsive disorder symptom severity. This clinician-rated scale demonstrates excellent reliability and internal consistency for assessing obsessions and compulsions.

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Area of Science:

  • Psychiatry
  • Clinical Psychology
  • Behavioral Science

Background:

  • Existing rating scales for obsessive-compulsive disorder (OCD) have limitations.
  • A need exists for a specific measure of OCD symptom severity.
  • The Yale-Brown Obsessive Compulsive Scale (Y-BOCS) was developed to address these issues.

Purpose of the Study:

  • To introduce and evaluate the Yale-Brown Obsessive Compulsive Scale (Y-BOCS).
  • To assess the reliability and validity of the Y-BOCS in measuring OCD symptom severity.
  • To determine if the scale is influenced by the type of obsessions or compulsions.

Main Methods:

  • The Y-BOCS is a 10-item clinician-rated scale, with scores ranging from 0 to 40.
  • Interrater reliability was assessed using four raters and 40 OCD patients.

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  • Internal consistency was evaluated using Cronbach's alpha coefficient.
  • Pretreatment symptom severity was assessed in 42 OCD patients.

    • Main Results:

    • The Y-BOCS demonstrated excellent interrater reliability for total scores and individual items.
    • High internal consistency was found among all item scores.
    • Each item was frequently endorsed and measured a range of symptom severity.
    • The scale effectively measured symptom severity across different types of OCD.

    Conclusions:

    • The Yale-Brown Obsessive Compulsive Scale is a reliable instrument for assessing OCD symptom severity.
    • The Y-BOCS is suitable for patients with varying symptom severity and types.
    • The scale provides a specific and consistent measure for clinical use and research.