Psychology HL P2 - MARKSCHEME May 2000 PSYCHOLOGY Higher...

Info iconThis preview shows pages 1–4. Sign up to view the full content.

View Full Document Right Arrow Icon

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: MARKSCHEME May 2000 PSYCHOLOGY Higher Level Paper 2 M00/350/H(2)M INTERNATIONAL BACCALAUREATE BACCALAUR&AT INTERNATIONAL BACHILLERATO INTERNACIONAL 35 pages SECTION A [2 marks] 1. Describe the main features of a longitudinal study. Same participants (or group/organisation) studied over extended time period; [1 mark] for time; [1 mark] for same participants; [2 marks] 2. How might the researchers have obtained the same sort of information by conducting a cross-sectional study in this company? By testing at the same time people who had been with the company 3, 9 and 18 months. Without &at the same time, answers may be ambiguous. Award [1 mark] where the design is ambiguous but the times of workers service are included. [4 marks] 3. State one advantage and one disadvantage that the cross-sectional study would have when compared with the longitudinal study actually conducted. Give reasons for your answers. Advantage:speedy results (because all groups tested at same time); no participants drop out of study (because dont have to wait for them to gain service); no specific cohort effect (the longitudinal study might be confounded by a particular event occurring during the study). Disadvantage: Cant compare same person across time so participant differences between groups may have effect; one of the groups might have had special experience which confounds results. Award [1 mark] for each advantage + clear reason and disadvantage + clear reason. Do not award marks for more than one advantage or disadvantage. [1 mark] 4. Describe what is meant by selecting a sample &at random. A random sample is one drawn where every person in the target population had an equal chance of being selected. Candidates must include reference to equal probability of selection in some form of words. &Haphazard, &drawn by chance, and similar are not adequate. However, &an unbiased sample or similar is adequate. 7 M00/350/H(2)M [2 marks] 5. Explain how the researcher might select a sample of 10 workers from a department containing 100 workers altogether. The system described must simply work. Acceptable would be putting all 100 names &in a hat (or container), shuffling, and removing ten. For full marks, shuffling in some form should be included. Also acceptable are using a computer but only [1 mark] for this without elaboration. Similarly &using table might be offered and again only [1 mark] without elaboration. More subtle is &taking every 10th name on the list. Give [1 mark] , though technically this is not random (or, more correctly, not &equal probability sampling) unless the first number is chosen randomly. That is, one chooses a number between 1 and 10 at random ( k ) then selects every k th person on the list. No candidate is likely to offer this, but give full marks if they do. Give no mark for any method which simply draws a haphazard sample ( e.g. going to the canteen and just taking anyone who happens along without bias)....
View Full Document

Page1 / 30

Psychology HL P2 - MARKSCHEME May 2000 PSYCHOLOGY Higher...

This preview shows document pages 1 - 4. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online