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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 for his research, Ken would first determine the strata for the high school student population demographic across the city he has chosen. This involves identifying relevant factors such as age groups and gender among the students. After defining the strata, Ken would select student participants proportionally from each identified group to ensure that the sample reflects the overall demographics of the high school population in the city.
Step 2
Explain which statistical test Ken would use for his data.
Answer
Ken would use a Wilcoxon signed ranks test because he is looking for a difference between performance in the morning and afternoon on memory processing tasks. This non-parametric test is appropriate since it assesses whether there is a statistically significant difference between paired observations in a repeated measures design, which fits his research model.