Dr. Lin conducted an investigation into whether the presence of a smartphone on a desk affects student performance in a concentration task. She posted an advertisement on a university student union online noticeboard, inviting students to sign up for a 15-minute laboratory session.
The volunteers were randomly allocated to one of two conditions. In Condition A, participants completed a complex logic puzzle with their smartphone placed face-up on the desk next to them. In Condition B, participants completed the same puzzle with their smartphone left in a locker outside the room. Dr. Lin measured the time taken (in seconds) to complete the puzzle.
Explain one strength and one weakness of the sampling technique used by Dr. Lin for her investigation about concentration.
Practise Edexcel A Level Psychology Methods with exam-style questions for A Level Psychology. 100 questions, 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.