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YBOCS

Clinician-rated or self-report. Rate each item based on the past week. Items 1–5 measure obsessions, items 6–10 measure compulsions.

1. 1.Time occupied by obsessive thoughts

   • [0]0 — None
   • [1]1 — Mild (<1h/day or occasional)
   • [2]2 — Moderate (1–3h/day or frequent)
   • [3]3 — Severe (3–8h/day or very frequent)
   • [4]4 — Extreme (>8h/day or nearly constant)

2. 2.Interference from obsessive thoughts

   • [0]0 — None
   • [1]1 — Mild, slight interference but overall performance not impaired
   • [2]2 — Moderate, definite interference but still manageable
   • [3]3 — Severe, causes substantial impairment
   • [4]4 — Extreme, incapacitating

3. 3.Distress from obsessive thoughts

   • [0]0 — None
   • [1]1 — Mild, infrequent and not too disturbing
   • [2]2 — Moderate, frequent and disturbing but manageable
   • [3]3 — Severe, very frequent and very disturbing
   • [4]4 — Extreme, near-constant and disabling distress

4. 4.Resistance against obsessions

   • [0]0 — Always makes an effort to resist
   • [1]1 — Tries to resist most of the time
   • [2]2 — Makes some effort to resist
   • [3]3 — Yields to all obsessions without attempting to control them
   • [4]4 — Completely and willingly yields

5. 5.Degree of control over obsessive thoughts

   • [0]0 — Complete control
   • [1]1 — Much control — usually able to stop or divert
   • [2]2 — Moderate control — sometimes able to stop
   • [3]3 — Little control — rarely successful
   • [4]4 — No control — experienced as involuntary

6. 6.Time spent performing compulsive behaviors

   • [0]0 — None
   • [1]1 — Mild (<1h/day or occasional)
   • [2]2 — Moderate (1–3h/day or frequent)
   • [3]3 — Severe (3–8h/day or very frequent)
   • [4]4 — Extreme (>8h/day or nearly constant)

7. 7.Interference from compulsive behaviors

   • [0]0 — None
   • [1]1 — Mild, slight interference
   • [2]2 — Moderate, definite interference but manageable
   • [3]3 — Severe, substantial impairment
   • [4]4 — Extreme, incapacitating

8. 8.Distress associated with compulsive behavior (if prevented)

   • [0]0 — None
   • [1]1 — Mild, only slightly anxious if prevented
   • [2]2 — Moderate, anxiety would mount but remain manageable
   • [3]3 — Severe, prominent and very disturbing anxiety
   • [4]4 — Extreme, incapacitating anxiety

9. 9.Resistance against compulsions

   • [0]0 — Always makes an effort to resist
   • [1]1 — Tries to resist most of the time
   • [2]2 — Makes some effort to resist
   • [3]3 — Yields to almost all compulsions
   • [4]4 — Completely and willingly yields

10. 10.Degree of control over compulsive behavior

    • [0]0 — Complete control
    • [1]1 — Much control — some pressure but usually able to stop
    • [2]2 — Moderate control — strong pressure, must complete with effort
    • [3]3 — Little control — very strong drive, difficult to delay
    • [4]4 — No control — drive experienced as involuntary and overpowering