Yale-brown Obsessive Compulsive Scale (Y-bocs)

1. TIME OCCUPIED BY OBSESSIVE THOUGHTS
How much of your time is occupied by obsessive thoughts?

0Try to resist all the time

1Try to resist most of the time

2Make some effort to resist

3Yield to all obsessions without attempting to control them, but with some reluctance

4Completely and willingly yield to all obsessions

2. INTERFERENCE DUE TO OBSESSIVE THOUGHTS
How much do your obsessive thoughts interfere with your work, school, social, or other important role functioning? Is there anything that you don’t do because of them?

0None

1Slight interference with social or other activities, but overall performance not impaired

2Definite interference with social or occupational performance, but still manageable

3Causes substantial impairment in social or occupational performance

4Incapacitating

3. DISTRESS ASSOCIATED WITH OBSESSIVE THOUGHTS
How much distress do your obsessive thoughts cause you?

0None

1Not too disturbing

2Disturbing, but still manageable

3Very disturbing

4Near constant and disabling distress

4. RESISTANCE AGAINST OBSESSIONS
How much of an effort do you make to resist the obsessive thoughts? How often do you try to disregard or turn your attention away from these thoughts as they enter your mind?

0Try to resist all the time

1Try to resist most of the time

2Make some effort to resist

3Yield to all obsessions without attempting to control them, but with some reluctance

4Completely and willingly yield to all obsessions

5. DEGREE OF CONTROL OVER OBSESSIVE THOUGHTS
How much control do you have over your obsessive thoughts? How successful are you in stopping or diverting your obsessive thinking? Can you dismiss them?

0Complete control

1Usually able to stop or divert obsessions with some effort and concentration

2Sometimes able to stop or divert obsessions

3Rarely successful in stopping or dismissing obsessions, can only divert attention with difficulty

4Obsessions are completely involuntary, rarely able to even momentarily alter obsessive thinking.

6. TIME SPENT PERFORMING COMPULSIVE BEHAVIORS
How much time do you spend performing compulsive behaviors? How much longer than most people does it take to complete routine activities because of your rituals? How frequently do you do rituals?

0None

1Less than 1 hr/day or occasional performance of compulsive behaviors

2From 1 to 3 hrs/day, or frequent performance of compulsive behaviors

3More than 3 and up to 8 hrs/day, or very frequent performance of compulsive behaviors

4More than 8 hrs/day, or near constant performance of compulsive behaviors (too numerous to count)

7. INTERFERENCE DUE TO COMPULSIVE BEHAVIORS
How much do your compulsive behaviors interfere with your work, school, social, or other important role functioning? Is there anything that you don’t do because of the compulsions?

0None

1Slight interference with social or other activities, but overall performance not impaired

2Definite interference with social or occupational performance, but still manageable

3Causes substantial impairment in social or occupational performance

4Incapacitating

8. DISTRESS ASSOCIATED WITH COMPULSIVE BEHAVIOR
How would you feel if prevented from performing your compulsion(s)? How anxious would you become?

0None

1Only slightly anxious if compulsions prevented

2Anxiety would mount but remain manageable if compulsions prevented

3Prominent and very disturbing increase in anxiety if compulsions interrupted

4Incapacitating anxiety from any intervention aimed at modifying activity

9. RESISTANCE AGAINST COMPULSIONS
How much of an effort do you make to resist the compulsions?

0Always try to resist

1Try to resist most of the time

2Make some effort to resist

3Yield to all obsessions without attempting to control them, but with some reluctance

4Completely and willingly yield to all obsessions

10. DEGREE OF CONTROL OVER COMPULSIVE BEHAVIOR
How strong is the drive to perform the compulsive behavior? How much control do you have over the compulsions?

0Complete control

1Pressure to perform the behavior but usually able to exercise voluntary control over it

2Strong pressure to perform behavior, can control it only with difficulty

3Very strong drive to perform behavior, must be carried to completion, can only delay with difficulty

4Drive to perform behavior experienced as completely involuntary and over-powering, rarely able to even momentarily delay activity.