A sports scientist wanted to investigate the efficacy of two recovery protocols on post-reconstruction knee rehabilitation times.
The scientist selected a stratified sample of 40 injured athletes from a database containing 240 professional athletes and 160 amateur athletes. The selected sample consists of 24 professional athletes and 16 amateur athletes.
The participants were assigned to one of two conditions:
The scientist wants to randomly allocate the 40 athletes in their stratified sample to the two recovery protocols. To control for the confounding variable of pre-existing physical conditioning, they require an equal number of professional athletes in each group (12 in each) and an equal number of amateur athletes in each group (8 in each).
Explain how the scientist would do this.
Practise AQA A Level Psychology Research methods with exam-style questions for A Level Psychology. 100 questions covering Experimental method, Observational techniques, Self-report techniques, Correlations, Content analysis (A-level only), Case studies (A-level only), Scientific processes, Data handling and analysis, and Inferential testing (A-level only), 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.