A psychologist plans to investigate whether there is a relationship between the amount of time Year 9 pupils spend doing physical activity outside school in one week and their attention while completing a task in which they cross out target symbols.
The psychologist's first plan is shown in the table.
| Co-variable | Planned measurement |
|---|---|
| Physical activity outside school | Ask each pupil which physical activities they did during the previous seven days and record a list. |
| Attention during the task | Watch each pupil and write a short comment describing how attentive they appeared. |
Explain why these measurements would not provide suitable data for a correlation. Outline how each co-variable could instead be measured.
182 exam-style questions on OCR GCSE Psychology 7.1 Planning Research, covering 7.1.1 Hypotheses, 7.1.2 Variables, 7.1.3 Experimental Designs, 7.1.4 Populations and Sampling, 7.1.5 Ethical issues, and 7.1.6 Dealing with ethical issues and BPS Code. Each one has a worked solution and a mark scheme showing where the marks go.