Dr. Mercer conducted a study using a self-report questionnaire to investigate the relationship between the duration of pre-competition mental visualization routines and self-rated competitive confidence among professional archers.
Explain one improvement that Dr. Mercer could make to increase the validity of this investigation.
Practise Edexcel A Level Psychology Methods with exam-style questions for A Level Psychology. 638 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.