Elena conducted a field experiment to investigate obedience to authority. She wanted to see if passersby would pick up a dropped piece of litter when instructed to do so by a confederate. The confederate was dressed either in a security guard's uniform (high authority condition) or in everyday casual clothes (low authority condition). Elena used an opportunity sample of 30 pedestrians in a bustling city centre on a Tuesday afternoon.
Explain one improvement that Elena could make to her study.
51 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.