A sports scientist is conducting a study to compare the effectiveness of two post-exercise recovery methods: Cryotherapy (Group A) and Active Recovery (Group B). There are 120 amateur runners participating in the trial. The scientist assigns the first 60 runners who sign up for the study to Group A and the remaining 60 runners to Group B.
For each participant, the scientist records their perceived muscle soreness rating 24 hours after completing a marathon.
One way of improving this study would be to use random allocation to assign the runners to the two groups. Explain how random allocation could have been carried out in this study.
Practise AQA A Level Psychology Scientific processes with exam-style questions for A Level Psychology. 689 questions, matched to the AQA A Level Psychology (7182) 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.
