Psychology · 2002 · November · Paper 2 · SL · Markscheme

MARKSCHEME November 2002 PSYCHOLOGY Standard Level Paper 2 24 pages N02/350/S(2)M++ INTERNATIONAL BACCALAUREATE BACCALAURÉAT INTERNATIONAL BACHILLERATO INTERNACIONALc Answer one question chosen from any Optional Subject Area. Marks will be awarded for clear presentation of theories, inclusion of appropriate empirical studies and evaluation . When structured questions are set (that is with parts a or b) candidates should clearly label each part of their answer a or b. Biological bases of behaviour [12 marks] [13 marks] 1. (a) Describe the effect on the nervous system of two different drugs. Many candidates will be all too familiar with the effects on behaviour of so called recreational drugs. In or der to obtain high marks overall they will need to be selective in the choice of two since they are also required to describe their effect on the nervous system. Most of the drugs mentioned by candidates will usually come under one of the main classifications such as neuroleptic, antidepressant and anxiolytic. For high marks it is im portant that candida tes describe the effect on the nervous system. Fo r example, the monoamine oxidase inhibitor ( MAOI) group acts on the neuro-tr ansmitters noradrenaline (norepinephrine) and serotonin by inhibiting the enzyme that deals with these two transmitters. (b) Discuss the effect on behaviour and/or psychology of these same two drugs. MAOIs may have side effects such as heart arrhythmia or blurred vision. These unwanted effects are avoided by tetracylic drugs such as Prozac, but this drug may give rise to se xual dysfunction or lack of normal aggression. Drugs may also affect several behaviours including appetite, alertness or sleep. Any relevant drug may be considered by candidate. [0 marks] should be awarded for part (b) if different drugs are considered from those used in part (a ). No material should be awarded credit twice. – 3 – N02/350/S(2)M+