The relationship between daily caffeine consumption and sleep quality is a major focus in health psychology. A researcher wishes to use a correlational design to investigate whether there is a relationship between daily caffeine intake and the amount of deep (slow-wave) sleep a person receives.
Explain how you would conduct a study using a correlational technique to investigate if there is a relationship between daily caffeine intake and the duration of deep sleep. Justify your decisions as part of your explanation.
You must refer to:
You should use your own experience of practical activities to inform your response.
