A-LevelPsychologyResearch methods9990/22 · Feb/Mar 2019 · Q53 Marks

In the study by Schachter and Singer (two factors in emotion), the 'mean number of acts initiated' was calculated for the euphoria group.

(a)Explain how a mean is calculated.[1]
(b)Explain one advantage of using the mean as a measure of central tendency in this study.[2]

Mark scheme

Marking points from the official mark scheme (Feb/Mar 2019). The mark or mark type is shown in brackets.

[1] 1 mark for 'Add up all the scores and divide by the number of scores' (definitive)
[2] 1 mark for advantage 1 mark for link It takes account of all the scores = 1 (generic) It takes account of all the scores within the euphoria group = 1 (generic) + 1 (link) = 2 marks It is more representative of the whole group = 1 (generic) As each euphoric participants' score is included it is more representative of the whole group = 1 + 1 = 2 marks The median/mode only looks at one euphoric person's score whereas the mean includes all of them in the calculation = 2 marks

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Topic: Research methods, A-Level Psychology (syllabus 9990). Structured question, 3 marks.
Source: A-Level Psychology, Feb/Mar 2019 Paper 2 Variant 2, question 5.

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