Dr. Harrison investigated whether a defendant's regional accent influences jury decision-making. He recruited his sample of participants using an opportunity sampling technique, approaching members of the public in a city centre shopping mall on a Tuesday afternoon.
Dr. Harrison presented his participants with an audio recording of a defendant's testimony in a burglary trial. In Condition A, the defendant spoke with a standard Received Pronunciation (RP) accent, and in Condition B, the defendant spoke with a strong regional accent. Participants were then asked to rate the likelihood of the defendant's guilt on a scale from 1 (definitely innocent) to 7 (definitely guilty).
Explain one weakness of Dr. Harrison using an opportunity sampling technique for 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.