Question 115 marks
Question
One drug treatment for depression is monoamine oxidase inhibitors (MAOIs). The effectiveness of this treatment can be tested using randomised control trials. (a) Explain how MAOIs work when treating depression. [2] (b) (i) Suggest how randomised control trials can be used to study the effectiveness of MAOIs. [2] (ii) Give one strength of a randomised control trial. [2] (c) Suggest one treatment for depression, other than MAOIs. [4] (d) Discuss the strengths and weaknesses of using drugs to treat depression. You should include a conclusion in your answer. [5] Psychology and consumer behaviour
Mark scheme
1 One drug treatment for depression is monoamine oxidase inhibitors (MAOIs). The effectiveness of this treatment can be tested using randomised control trials. 1(a) Explain how MAOIs work when treating depression. 2 Most likely answer (other appropriate responses to be credited): MAOIs inhibit the enzyme monoamine oxidase. This enzyme normally breaks down noradrenaline, serotonin and dopamine, but if these neurotransmitters are not broken down, they stay at normal high levels and so ‘reduce depression’. Marks: 1 mark for partial explanation; 2 marks for detailed explanation. 1(b)(i) Suggest how randomised control trials can be used to study the 2 effectiveness of MAOIs. Most likely answer (other appropriate responses to be credited): • Participants are randomly allocated to conditions of MAOI or control (equal chance of being in either condition) • For example a participant has a 50/50 chance of being in an experimental (MAOI) group or a control (non-receiving of MAOI) group. Marks: 1 mark for ‘random allocation’ +1 mark for detail or related to study. 1(b)(ii) Give one strength of a randomised control trial. 2 Most likely answer (other appropriate responses to be credited): Researchers do not allocate participants to conditions so there is no bias. Instead participants are allocated randomly by chance, so reducing extraneous variables. Marks: 1 mark basic answer 2 marks detail/elaboration/example. 1(c) Suggest one treatment for depression, other than MAOIs. 4 Most likely answer (other appropriate responses to be credited): • Electroconvulsive therapy. Muscle relaxant given; electricity applied bilaterally or unilaterally; patient convulses (twitches because of muscle relaxant); Patient is unconscious, then wakes and recovers. • Beck et al. (1979) cognitive restructuring is a stage process, (i) explanation of therapy (ii) identification of unpleasant emotions, (iii) the situations in which these occur and (iv) associated negative automatic thoughts. (v) challenge the negative thoughts and (vi) replace them with positive thoughts. (vii) challenge the underlying dysfunctional beliefs and (viii) therapy ends. • Rational emotive behaviour therapy. (REBT) Ellis focused on how illogical beliefs are maintained through: A: an activating event, B: the belief held about A, C: the consequences – thoughts, feelings or behaviours – resulting from A. RET therefore involves: D: disputing the irrational beliefs, E: the effects of successful disruption of the irrational beliefs. • SSRIs: (e.g. Prozac) act on the neurotransmitter serotonin to stop it being reabsorbed and broken down after it has crossed a synapse. Marks: 1 mark identification. 2–4 marks for detail and quality. 1(d) Discuss the strengths and weaknesses of using drugs to treat 5 depression. You 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 (an advantage for many people) • drugs (MAOIs) inhibit production of neurochemicals associated with depression Weaknesses: • drugs are addictive so should be short-term use only. • drugs may not be taken as prescribed (non-adherence) • drugs ignore the role of alternative cuases of depression (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.