Mindfulness and Cortisol
A neuroscientist wants to investigate whether there is a relationship between the daily duration of mindfulness meditation practice (in minutes) and the concentration of salivary cortisol (a biomarker of stress, measured in μg/dL\mu\text{g/dL}μg/dL) in corporate employees. To do this, they plan to use a correlational design.
Describe one weakness of using a correlational design in this study.
644 exam-style questions on OCR A Level Psychology Research methods and techniques. Each one has a worked solution and a mark scheme showing where the marks go.