Liam has asked for your help to design a laboratory experiment to find out if drinking a caffeinated beverage compared to plain water affects people's performance on a visual attention task.
Describe a procedure you could suggest to Liam for his laboratory experiment.
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.
