Source: Phillips et al. (1997), BDD-YBOCS Adult Version
Tags: BDD-YBOCS, compulsive behaviours, BDD activities, insight, avoidance, severity rating, appearance-related compulsions
Difficulty: Intermediate | Prerequisites: Part 1 of these notes (Overview and Obsessive Subscale)
Big Picture
Part 1 covered the thought side of BDD: how much time the obsessions take, how much they interfere and cause distress, and how much the patient can resist and control them. This second set of notes covers the behavioural side (Items 6 to 10), which mirrors the same five dimensions but applies them to compulsive activities like mirror checking, grooming, and camouflaging. It also covers two supplementary items, Insight and Avoidance, that round out the clinical picture and have their own exam relevance.
Items 6 to 10 of the BDD-YBOCS apply the same five measurement dimensions (time, interference, distress, resistance, control) to compulsive behaviours rather than obsessive thoughts. The activity checklist covers common BDD behaviours like mirror checking, grooming, camouflaging, and skin picking. Items 11 (Insight) and 12 (Avoidance) are scored separately and capture how much the patient recognises their concerns may be unreasonable and how much they withdraw from life because of BDD.
BDD-Related Compulsive Activities
Repetitive behaviours performed in response to appearance-related preoccupations. The BDD-YBOCS checklist includes: mirror checking, grooming, applying makeup, excessive exercise (beyond 1 hour/day), camouflaging with clothing or cover, scrutinising others' appearance (comparing), questioning others about one's appearance, and skin picking. Think of these as the behavioural output of the obsessive thoughts measured in Items 1 to 5.
Resistance Against Compulsions (Item 9)
The degree of effort a patient makes to resist performing their BDD-related activities. As with the thought-resistance item (Item 4), the scale rates effort only, not success. In simple terms, this captures whether the person is even trying to stop the behaviour.
Degree of Control Over Compulsive Behaviour (Item 10)
How strong the drive is to perform the behaviour and how much voluntary control the patient can exercise over it. Ranges from complete control (0) to no control, where the drive feels completely involuntary and overpowering (4). Think of it as measuring how much the compulsion has taken the steering wheel.
Insight (Item 11)
The patient's capacity to recognise that their appearance concerns may be exaggerated or irrational. The 0 to 4 scale runs from excellent insight (fully rational, acknowledges the thoughts are excessive) to lacking insight/delusional (definitely convinced their concerns are reasonable, unresponsive to contrary evidence).
Avoidance (Item 12)
Deliberate avoidance of activities, places, or people because of BDD-related thoughts or behaviours. The scale specifically excludes avoidance of mirrors and avoidance of compulsive behaviours; it focuses on social and functional withdrawal. In simple terms, this measures how much BDD is causing the patient to retreat from normal life.
Measures how much of the patient's day is consumed by BDD-related compulsive behaviours
The clinician first identifies which activities the patient engages in from a checklist:
Checking mirrors or other reflective surfaces
Grooming activities
Applying makeup
Excessive exercise (time beyond 1 hour a day)
Camouflaging with clothing or other cover (rate time spent selecting/changing clothes, not time wearing them)
Scrutinising others' appearance (comparing)
Questioning others about or discussing one's appearance
Skin picking
Other (open field)
Anchors mirror Item 1:
0 = None
1 = Mild (less than 1 hr/day)
2 = Moderate (1 to 3 hrs/day)
3 = Severe (more than 3 and up to 8 hrs/day)
4 = Extreme (more than 8 hrs/day)
Note: for camouflaging, only the time spent choosing and changing clothes counts, not the time spent wearing them
Measures how much the compulsive activities interfere with social or work functioning
Prompt: "How much do these ACTIVITIES interfere with your social or work (role) functioning?"
Anchors identical to Item 2:
0 = None
1 = Mild, slight interference but overall performance not impaired
2 = Moderate, definite interference but still manageable
3 = Severe, substantial impairment in social, occupational, or role performance
4 = Extreme, incapacitating
Measures how the patient would feel if prevented from performing their BDD-related activities
This is a hypothetical question: "How would you feel if you were prevented from performing these ACTIVITIES? How anxious would you become?"
Key distinction from Item 3: Item 3 measures distress caused by the thoughts; Item 8 measures distress that would result from blocking the behaviours
The clinician rates the degree of distress or frustration the patient would experience if the activities were suddenly interrupted
Anchors:
0 = None
1 = Mild, only slightly anxious if behaviour prevented
2 = Moderate, anxiety would mount but remain manageable
3 = Severe, prominent and very disturbing increase in anxiety if behaviour interrupted
4 = Extreme, incapacitating anxiety from any intervention aimed at modifying activity
Measures effort to resist performing BDD-related activities
Same logic as Item 4: rate effort to resist, not success or failure in controlling
The patient's resistance may or may not correlate with their ability to control the behaviours
Anchors:
0 = Makes an effort to always resist, or symptoms so minimal does not need to actively resist
1 = Tries to resist most of the time
2 = Makes some effort to resist
3 = Yields to almost all behaviours without attempting to control them, but with some reluctance
4 = Completely and willingly yields to all behaviours related to body defect
Measures how strong the drive is to perform the behaviours and how much voluntary control the patient has
Prompt: "How strong is the drive to perform these behaviours? How much control do you have over them?"
Anchors:
0 = Complete control, or control unnecessary because symptoms are mild
1 = Much control, experiences pressure but usually able to exercise voluntary control
2 = Moderate control, strong pressure, can control only with difficulty
3 = Little control, very strong drive, must be carried to completion, can delay only with difficulty
4 = No control, drive experienced as completely involuntary and overpowering, rarely able to even momentarily delay activity
The language here shifts from "stopping" (Item 5, about thoughts) to "delaying" (Item 10, about behaviours), reflecting the different nature of cognitive vs. behavioural control
Measures how much the patient recognises that their appearance concerns may be exaggerated
Three probe questions the clinician uses:
"Is it possible that your defect might be less noticeable or less unattractive than you think it is?"
"How convinced are you that [body part] is as unattractive as you think it is?"
"Can anyone convince you that it does not look so bad?"
Anchors:
0 = Excellent insight, fully rational
1 = Good insight: readily acknowledges absurdity of thoughts, but does not seem completely convinced there is nothing to be concerned about besides anxiety
2 = Fair insight: reluctantly admits thoughts seem unreasonable but wavers
3 = Poor insight: maintains that thoughts are not unreasonable
4 = Lacks insight, delusional: definitely convinced that concerns are reasonable, unresponsive to contrary evidence
Clinical significance: patients scoring 3 or 4 may meet criteria for BDD with absent insight/delusional beliefs, which is a DSM-5 specifier. These patients are harder to engage in CBT and may require different treatment approaches.
Measures deliberate avoidance of activities, places, or people because of BDD-related thoughts or behaviours
Prompt: "Have you been avoiding doing anything, going any place, or being with anyone because of your thoughts or behaviours related to your body defects?"
If the patient says yes, the clinician follows up: "What do you avoid?"
Critical exclusion: do not include avoidance of mirrors or avoidance of compulsive behaviours. This item focuses on avoidance of social interactions and work-related activities.
Anchors:
0 = No deliberate avoidance
1 = Mild, minimal avoidance
2 = Moderate, some avoidance clearly present
3 = Severe, much avoidance; avoidance prominent
4 = Extreme, very extensive avoidance; patient avoids almost all activities
This item captures functional withdrawal and social isolation, which are among the most disabling consequences of BDD
Clinicians use the BDD-YBOCS at intake to establish a severity baseline, then re-administer it at regular intervals (often every few weeks) to track whether treatment is working. A meaningful drop in the total score is one of the primary outcome measures in BDD clinical trials.
The compulsive activity checklist (Item 6) also serves a practical clinical function beyond scoring: it helps the therapist identify which specific behaviours to target in exposure and response prevention (ERP). If a patient scores high on mirror checking and comparing, for example, those become the focus of behavioural experiments.
The Insight item has direct treatment implications. Patients with poor insight or delusional conviction (scores 3 to 4) often respond less well to standard CBT and may need augmentation with antipsychotic medication. This makes Item 11 a clinically actionable data point, not just an academic measure.
"Item 8 measures how distressed the patient is by their BDD behaviours." Close, but not quite. Item 8 measures anticipated distress if the behaviours were prevented. It is a hypothetical: how anxious would you become if you could not do these things? This distinction matters because it captures the compulsive grip of the behaviour rather than its day-to-day emotional cost.
"Avoidance of mirrors counts toward the Avoidance item (Item 12)." It does not. The scale explicitly excludes mirror avoidance and avoidance of compulsive behaviours. Item 12 focuses only on avoidance of social interactions, work-related activities, and other life participation.
"Excessive exercise means any exercise." The checklist defines excessive exercise as time beyond 1 hour a day. Moderate daily exercise does not count as a BDD compulsion on this scale.
"A patient with poor insight is not a good candidate for any psychological treatment." Poor insight makes standard CBT harder, but it does not rule out treatment entirely. It may indicate a need for motivational interviewing, adapted CBT protocols, or pharmacological augmentation. The Insight item flags a clinical challenge, not a contraindication.
⚠️ The compulsive subscale (Items 6 to 10) mirrors the obsessive subscale (Items 1 to 5) in structure. Both use the same five dimensions: time, interference, distress, resistance, and control. Be able to name all five and explain how they apply to both thoughts and behaviours.
⚠️ Know the full activity checklist for Item 6. At minimum, be able to recall: mirror checking, grooming, makeup, excessive exercise, camouflaging, comparing to others, reassurance seeking, and skin picking.
⚠️ Item 8 asks a hypothetical question (how anxious would you become if prevented from performing these activities), unlike Item 3, which asks about current distress from the thoughts. This distinction is testable.
⚠️ Item 11 (Insight) links to the DSM-5 specifier "with absent insight/delusional beliefs." A score of 4 on the Insight item corresponds to delusional conviction, which is a key clinical concept.
⚠️ Item 12 (Avoidance) explicitly excludes mirror avoidance. If an exam question asks what is not counted in the Avoidance item, mirror avoidance and avoidance of compulsive behaviours are the answers.
True or False: Item 8 measures how distressed the patient currently feels about their compulsive behaviours. (False: it measures anticipated distress if the behaviours were prevented.)
Fill in the blank: On the activity checklist, excessive exercise is defined as exercise beyond ______ per day. (1 hour)
True or False: A score of 4 on Item 11 (Insight) means the patient has delusional conviction about their appearance concerns. (True)
Fill in the blank: Item 12 (Avoidance) specifically excludes avoidance of ______ and avoidance of ______. (mirrors; compulsive behaviours)
True or False: For the camouflaging item on the activity checklist, you rate the total time spent wearing the camouflaging clothing. (False: you rate only the time spent selecting and changing clothes, not time wearing them.)
Q: A patient spends 4 hours per day checking mirrors, grooming, and comparing herself to others. What score would she receive on Item 6 (Time Spent in Activities)?
A: A score of 3 (Severe), because she spends more than 3 and up to 8 hours per day on BDD-related activities.
Q: What is the key difference between Item 3 (Distress from thoughts) and Item 8 (Distress from activities)?
A: Item 3 measures the distress the patient currently experiences because of their appearance-related thoughts. Item 8 measures the distress the patient would experience hypothetically if they were prevented from performing their compulsive activities. One asks about present emotional pain; the other asks about anticipated anxiety from behavioural interruption.
Q: A patient scores 2 on Item 11 (Insight). Describe what this looks like clinically.
A: A score of 2 indicates fair insight. The patient reluctantly admits that their appearance concerns seem unreasonable, but they waver. They can be momentarily persuaded that their worries might be excessive, but they do not hold that perspective consistently.
Q: Why does Item 12 (Avoidance) exclude mirror avoidance?
A: Mirror avoidance is a different construct. Some BDD patients avoid mirrors as a coping strategy to reduce compulsive checking, while others compulsively check mirrors constantly. Avoidance of mirrors relates to the compulsive behaviour dimension (already captured in Items 6 to 10), whereas Item 12 specifically measures social and functional withdrawal, which captures a different aspect of disability.
Q: Explain why resistance and control are measured as separate items on both the obsessive and compulsive subscales.
A: Resistance measures the patient's effort or willingness to fight the symptom. Control measures the patient's actual ability to stop or reduce it. These are clinically independent: a patient may resist vigorously but have little control, or may have stopped resisting (high resistance score) despite retaining some latent ability. Separating them gives clinicians a more nuanced picture of the symptom's grip on the patient.
The compulsive subscale connects to behavioural models of OCD and anxiety. The same principle that compulsions in OCD are maintained by negative reinforcement (anxiety reduction) applies to BDD compulsions. This is the theoretical basis for exposure and response prevention (ERP), which is the frontline behavioural treatment for BDD.
Item 11 (Insight) connects to the broader concept of the insight spectrum in psychiatry, which appears across multiple disorders: OCD (with poor insight specifier in DSM-5), anorexia nervosa (ego-syntonic nature), and psychotic disorders. Understanding how insight is measured in BDD helps with comparative questions about insight across the diagnostic spectrum.
The activity checklist for Item 6 links to body-focused repetitive behaviours (BFRBs), particularly skin picking. Excoriation disorder (skin picking disorder) is its own DSM-5 diagnosis within the OCD spectrum, and its overlap with BDD-related skin picking is a nuance worth knowing for exam purposes.
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