Arthur carried out an experiment to investigate the effect of a defendant's physical attractiveness on mock jurors' perception of guilt. He selected his participants from visitors who were available in a public library on a Saturday morning.
He gave two separate groups of participants a court case transcript to read, each accompanied by a photograph of the defendant:
Arthur then asked all participants to rate how likely it was that the defendant committed the crime. This was measured on a scale of 1 to 10, where 1 represented 'definitely innocent' and 10 represented 'definitely guilty'.
Identify the sampling technique used by Arthur and explain one limitation of using this technique in this study.
Identify the independent variable (IV) and the dependent variable (DV) in this study.
Practise Edexcel A Level Psychology Content with exam-style questions for A Level Psychology. 1,059 questions covering Central nervous system and neurotransmitters, Effect of recreational drugs on transmission, Brain structure and aggression, Evolution and natural selection, Freud's psychodynamic explanation of aggression, Role of hormones in aggression, Individual differences, and Developmental psychology, matched to the Edexcel A Level Psychology (9PS0) specification and written in Paper 1, Paper 2 and Paper 3 style. Every question includes a full worked solution and mark scheme, so you can see where marks are awarded rather than just whether you got the answer right.
