Dr. Aris conducted an investigation to evaluate the effectiveness of a family-focused therapy (FFT) program for adolescents recovering from anorexia nervosa. He recruited an opportunity sample of 12 families from a single specialized eating disorder unit and asked the parents to complete a self-report questionnaire measuring family conflict levels before and immediately after the 6-week therapy program. His results showed a significant reduction in family conflict scores.
Explain one improvement Dr. Aris could make to his 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.