A-LevelPsychologyResearch methods9990/22 · Feb/Mar 2020 · Q32 Marks

In an experiment with a repeated measures design, there may be a problem with order effects.

Mark scheme

Marking points from the official mark scheme (Feb/Mar 2020). The mark or mark type is shown in brackets.

[1] 1 mark per relevant detail x2
[1] Practice effects are where repeated exposure to the experimental situation/test/conditions/both levels of the IV...
[1] ...leads to improvement through familiarity / increased skill
[1] so differences between conditions may be due to practice not due to the different levels of the independent variable
[1] Fatigue effects are where repeated exposure to the experimental situation/test/conditions/both levels of the IV...
[1] ...leads to worse performance through boredom/tiredness / decreased skill
[1] so differences between conditions may be due to fatigue not due to the different levels of the independent variable

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Topic: Research methods, A-Level Psychology (syllabus 9990). Structured question, 2 marks.
Source: A-Level Psychology, Feb/Mar 2020 Paper 2 Variant 2, question 3.

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