Dr. Aris conducted a study investigating the relationship between daily stress levels and adherence to a newly prescribed diabetic diet regime among patients with Type 2 diabetes. He used an opportunity sample of 15 participants recruited from a single private endocrinology clinic and relied on retrospective self-report questionnaires completed at the end of a 4-week period to measure diet adherence.
Explain one improvement that Dr. Aris could make to his investigation.
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.