Psychology · 2002 · November · Paper 2 · HL · Markscheme

MARKSCHEME November 2002 PSYCHOLOGY Higher Level Paper 2 27 pages N02/350/H(2)M+ INTERNATIONAL BACCALAUREATE BACCALAURÉAT INTERNATIONAL BACHILLERATO INTERNACIONALc SECTION A Read the following research report carefully, and then answer all the questions. The allocation of marks for each question is indicated in the margin. [1 mark] [1 mark] 1. (a) Define validity. Award [1 mark] where candidates clearly define the concept of validity as when the scale “measures what it is intended to measure”. (b) Explain what is meant by saying that the depressive feelings scale was valid. Candidates should state how scores on the depressive feelings scale measure the actual depressive feelings of the individual. [6 marks]2. State two possible operationalized alternate hypotheses for this study. [1 mark] for correct variables identified, [1 mark] for direction of prediction, and [1 mark] for operationalization of each hypothesis. “There will be a negative correlation between mean scores on a social activity scale and mean time spent using computers” and “There will be a positive correlation between mean scores on a depressive feelings scale and mean time spent using computers.” [2 marks] 3. Explain why it is important fo r psychology researchers to obtain informed consent from their participants. Give full marks to candidates who s how an understanding that informed consent means that participants are given a reasonable amount of knowledge to allow them to make a decision on whether or not to participate in the study. [1 mark] [2 marks] 4. (a) What is meant by stating that a random sample was used? [1 mark] for responses indicating th at each person in the target population has an equal chance of bein g selected to participate in the study. Candidates must include reference to equal probability of selection in order to earn the marks. Responses such as “haphazard”, “drawn by chance”, and similar are unacceptable. (b) State two methods that may be used to obtain a random sample. Any method that allows for equal pr obability of everybody in the target population being selected would be appropriate here. For example, drawing names out of a hat, assigning a number to each person