Psychology · 2000 · November · Paper 2 · HL · Markscheme

MARKSCHEME November 2000 PSYCHOLOGY Higher Level Paper 2 N00/350/H(2)M INTERNATIONAL BACCALAUREATE BACCALAURÉAT INTERNATIONAL BACHILLERATO INTERNACIONAL 35 pages SECTION A [2 marks]1. State two essential features of an experiment that this research study lacks. Experimenter does not manipulate/control independent variable. Participants are not allocated at random to conditions. Points concerning the laboratory are irrelevant. Give [1 mark] for an expression that there is not a lot of control in this research study, if it is expressed clearly enough. [2 marks]2. State an appropriate research hypothesis for the differences in tiredness. Prediction of a difference between the two groups on tiredness scores, whether ‘significant’ or not, are adequate for [1 mark] but a direction (Internet group higher) should be stated for [2 marks] (given the summary of background thinking), and as long as it is clear that the difference is between the two specific groups. [2 marks] 3. State a precise null hypothesis for the correlation between Internet use and sociability. The [population] correlation between Internet use scores and sociability scores is zero. [2 marks] wherever the null hypothesis is statistical and refers somehow to an existing lack of correlation in general. Where the samples are clearly intended give only [1 mark] and the same for any statement in a predictive form such as the inevitable ‘there will be no [significant] correlation..................’ which is not a null hypothesis but an implication of it and what should actually happen most of the time if the null hypothesis is true. – 7 – N00/350/H(2)M