Dr. Vance conducted a correlational study to investigate whether there was a relationship between salivary cortisol levels (measured in micrograms per deciliter, μg/dL\mu\text{g/dL}μg/dL) and the volume of the hippocampus (measured in cubic millimeters, mm3\text{mm}^3mm3) in a sample of healthy adult participants.
Outline one strength and one limitation of using a correlational research design in this investigation.
82 exam-style questions on Edexcel A Level Psychology Research methods and skills, covering Research methods and skills. Each one has a worked solution and a mark scheme showing where the marks go.