Arthur conducted a laboratory experiment to investigate the effect of background music on spatial reasoning. He used an independent groups design where 8 participants listened to uptempo classical music while completing a set of 10 complex geometric puzzles, and 8 participants completed the puzzles in silence. Arthur used opportunity sampling, selecting the first 16 members who arrived at an elite local chess club for a weekend tournament to participate. Each participant was given exactly 5 minutes to solve as many puzzles as possible.
Explain one improvement Arthur could make to his investigation.
Practise Edexcel A Level Psychology Synoptic review of studies with exam-style questions for A Level Psychology. 38 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.