Dr. Vance is conducting an investigation into the effectiveness of a virtual-reality biofeedback program compared to a standard progressive muscle relaxation (PMR) technique on the salivary cortisol levels of chronic tension headache sufferers.
Compare matched pairs and repeated measures experimental designs as used in health psychology.
57 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.