Marcus is a psychology student. For his research project, Marcus wants to investigate whether physiological stress could be related to daily caffeine consumption. He has permission from the facilities manager to conduct his investigation at a local co-working office space.
Describe how Marcus could use a correlational research method to investigate whether physiological stress could be related to daily caffeine consumption.
638 exam-style questions on Edexcel A Level Psychology Methods. Each one has a worked solution and a mark scheme showing where the marks go.