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Ken is planning to research whether the time of day has an impact on working memory processing speed - AQA - A-Level Psychology - Question 5 - 2021 - Paper 1
Question 5
Ken is planning to research whether the time of day has an impact on working memory processing speed. He intends to use high school students from the city where he l... show full transcript
Worked Solution & Example Answer:Ken is planning to research whether the time of day has an impact on working memory processing speed - AQA - A-Level Psychology - Question 5 - 2021 - Paper 1
Step 1
Describe how Ken would gather a stratified sample for his research.
Answer
To gather a stratified sample, Ken would first identify the different strata within the high school student population in the city. This might involve determining various demographic factors such as age groups, gender, and possibly other relevant characteristics. Once the strata are established, Ken would then randomly select participants from each stratum in proportion to their representation in the overall population, ensuring a comprehensive representation of the diverse student demographics.
Step 2
Explain which statistical test Ken would use for his data.
Answer
Ken would use a Wilcoxon signed ranks test to analyze the data. This non-parametric test is suitable for comparing two related samples, in this case, the performance of the same participants on mathematical tasks in the morning and afternoon. The test would allow him to assess any significant differences in the processing speed across the two time points.