Skip to content

9990 · 1.3.3

Treatment and management of impulse control disorders — practice questions

Practice and worked examples for 9990 Treatment and management of impulse control disorders. Short previews only — attempt the full question in MarkScheme against the official scheme.

Worked example 1

A patient with kleptomania reports intense urges when passing shops. Outline CBT and pharmacological treatments. Evaluate covert sensitisation as a treatment option. [10 marks]

Show solution outline

AO1 — CBT approach:

  • Functional analysis: Identify triggers (passing shops), thoughts ('I must take it'), and consequences (relief).
  • Coping skills: Urge delay, alternative behaviours, relapse prevention plan for high-risk situations.
  • Cognitive restructuring: Challenge beliefs that theft is 'unavoidable'.

AO1 — Pharmacological approach:

  • SSRIs (e.g. fluoxetine) — reduce urge intensity via serotonin; may help when comorbid anxiety/OCD features present.
  • Mood stabilisers (e.g. lithium) in some impulsive–aggressive presentations — less specific evidence for kleptomania.

AO3 — Covert sensitisation evaluation:

  • AO1: Client imagines aversive outcome (e.g. nausea, arrest) while visualising urge — aims for classical conditioning of disgust to cue.
  • Strengths: Some case study success; no physical punishment required unlike overt aversive methods.
  • Limitations: Weak evidence base — few controlled trials; effects may not generalise beyond therapy.
  • Ethics: Manipulative imagery; patient distress; autonomy concerns — largely replaced by CBT and SSRIs.

Judgement: CBT + SSRI is preferred — evidence-based and ethical; covert sensitisation is historical option with limited support.

Worked example 2

A clinical trial evaluates the effectiveness of naltrexone for pathological gambling. Gambling severity is measured using the PG-YBOCS scale (0-40) before and after 12 weeks of treatment. The results are as follows:

  • Naltrexone Group: Mean pre-treatment score = 24. Mean post-treatment score = 10.
  • Placebo Group: Mean pre-treatment score = 25. Mean post-treatment score = 19.

Calculate the mean improvement for each group and determine by what percentage naltrexone was more effective than placebo in reducing PG-YBOCS scores. [4 marks]

Show solution outline

Step 1: Calculate the mean improvement for the Naltrexone group.

  • The formula for improvement is: Pre-treatment score - Post-treatment score.
  • Improvement (Naltrexone) = 24 - 10 = 14 points.

Step 2: Calculate the mean improvement for the Placebo group.

  • Improvement (Placebo) = 25 - 19 = 6 points.

Step 3: Calculate the percentage by which naltrexone was more effective than placebo.

  • This is the percentage increase in improvement from the placebo baseline.
  • Formula: ((Improvement_Drug - Improvement_Placebo) / Improvement_Placebo) * 100%
  • Calculation: ((14 - 6) / 6) * 100%
  • = (8 / 6) * 100%
  • = 1.333... * 100%
  • = 133.3%

Conclusion: The naltrexone group showed a 14-point improvement, while the placebo group showed a 6-point improvement. The additional improvement seen in the naltrexone group is 133.3% greater than the improvement from placebo alone, indicating that naltrexone is a highly effective treatment compared to placebo for reducing gambling severity.