Question 115 marks
Question
Obsessive-compulsive disorder (OCD) can be treated with biomedical treatments and it can be managed with psychological treatments. Biomedical treatments include the use of drugs such as SSRIs. OCD can be managed psychologically using exposure and response prevention. (a) Explain how SSRIs work when treating OCD. [2] (b) (i) Explain what is meant by an obsession, using an example. [2] (ii) Explain what is meant by a compulsion, using an example. [2] (c) Outline one case study where exposure and response prevention was used to treat OCD. [4] (d) Discuss the strengths and weaknesses of using drugs to treat OCD. You should include a conclusion in your answer. [5] Psychology and consumer behaviour
Mark scheme
1(a) Obsessive-compulsive disorder (OCD) can be treated with biomedical 2 treatments and it can be managed with psychological treatments. Biomedical treatments include the use of drugs such as SSRIs. OCD can be managed psychologically using exposure and response prevention. Explain how SSRIs work when treating OCD. Most likely answer (other appropriate responses to be credited): It is assumed that OCD is caused by low levels of serotonin. it is thought that SSRIs work by increasing serotonin levels in the brain. serotonin is a neurotransmitter (a messenger chemical that carries signals between nerve cells in the brain). It's thought to have a good influence on mood, emotion and sleep. after carrying a message, serotonin is usually reabsorbed by the nerve cells (known as ‘reuptake’). SSRIs work by blocking (‘inhibiting’) reuptake, meaning more serotonin is available to pass further messages between nearby nerve cells. Marks: 1 mark basic answer; 2 marks elaboration/example. 1(b)(i) Explain what is meant by an obsession, using an example. 2 Most likely answer (other appropriate responses to be credited): Explanation: An obsession is a recurring and persistent thought that interferes with normal behaviour. (1 mark) NB: 0 marks for ‘thoughts’ or ‘obsessive thoughts’; 1 mark for repetitive/recurring thoughts Example: fearing contamination from anything that is unclean fear of losing control fear of losing or not having things you might need. order and symmetry: the idea that everything must line up “just right”. Marks: 1 mark for explanation; 1 mark for example. 1(b)(ii) Explain what is meant by a compulsion, using an example. 2 Most likely answer (other appropriate responses to be credited): Explanation: Compulsions or compulsive acts are repetitious, purposeful physical or mental actions that the individual feels compelled to engage in according to their own strict rules or in a stereotyped manner (1 mark) NB: 0 marks for ‘behaviours’ or ‘compulsive behaviours’ or ‘obsessive behaviours’; 1 mark for repetitive/excessive behaviours; 1 mark for ‘when obsessions are acted upon’. Example: excessive double checking of things such as doors, locks repeating counting, checking words excessive washing or cleaning accumulating things ‘junk’ (hoarding) Marks: 1 mark for explanation; 1 mark for example. NB: 0 marks for examples of impulse control disorders such as pyromania, kleptomania and gambling. 1(c) Outline one case study where exposure and response prevention was 4 used to treat OCD. Most likely answer (other appropriate responses to be credited): exposure and response prevention (ERP) exposure means facing or confronting the feared stimuli and/or situations repeatedly until the fear associated with them subsides, and response prevention means not carrying out the compulsive, avoidant, or escape behaviour. ERP targets the behavioural component of CBT. Lehmkuhl et al. (2008), ERP was used to treat a 12-year-old boy. Jason experienced contamination fears, avoiding ‘contaminated’ items (e.g. door knobs, library books, etc.) He would not sit on chairs, turn pages with his hands, or touch papers that other children had touched. Jason attended ten 50-minute sessions over 16 weeks. Jason was exposed to items he avoided and over the sessions his anxiety dropped. After three months his Y-BOCS score remained low. Marks: 1 mark basic answer (must include ERP and case study of OCD); 2–4 marks description of ERP with increasing detail and quality. NB: 0 marks for ‘Charles’, (OCD but no ERP) or the boy with button phobia (Saavedra and Silverman, ERP but not OCD) 1(d) Discuss the strengths and weaknesses of using drugs to treat OCD. You 5 should include a conclusion in your answer. Most likely answer (other appropriate responses to be credited): Strengths drugs easy to take; swallowing a pill drugs mean the patient is passive in their treatment (and advantage for many people) drugs have been shown to be effective in many studies Weaknesses drugs are addictive so should be short-term use only drugs are effective for associated problems such as anxiety drugs ignore the role of alternative explanations of OCD (treat symptom, not cause) Conclusion: any appropriate conclusion drawn from the discussion that has been presented. 1 mark if appropriate. A conclusion is a ‘decision reached by reasoning’ and so a summary of points already made scores 0 marks. Marks: Question requires discussion; always plural of each argument, and always requires conclusion. 1 mark for each advantage/disadvantage (however detailed) and related to the question up to 4 max. 2 marks max for two strengths/weaknesses unrelated to the question. 1 mark for conclusion.