Marcus conducted a laboratory experiment to investigate how a defendant's accent (regional vs. standard) influences mock-jury guilt ratings. He obtained an opportunity sample of 25 fellow university students who listened to a short, 30-second audio recording of a mock defendant.
Explain one improvement Marcus could make to his investigation.
120 exam-style questions on Edexcel A Level Psychology Content, covering Biological explanations of crime, Social explanations of crime, Cognitive and ethical interview techniques, Psychological formulation of offending, Cognitive-behavioural treatment for offenders, Biological treatment for offenders, Factors influencing eye-witness testimony, Factors influencing jury decision-making, Individual differences, and Developmental psychology. Each one has a worked solution and a mark scheme showing where the marks go.