Dr. Vance conducted a field experiment to investigate the weapon focus effect. A confederate entered a local grocery store and approached the cashier holding either a large metallic kitchen knife (high threat condition) or a bunch of keys (low threat condition). Dr. Vance used an opportunity sample of 25 actual shoppers who were in the store at the time of the incident. After leaving the store, shoppers were immediately approached by a researcher and asked to describe the confederate's facial features.
Explain one improvement that Dr. Vance could make to his study.
Practise Edexcel A Level Psychology Research methods and skills with exam-style questions for A Level Psychology. 657 questions covering Research methods and skills, 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.
