A sports scientist conducted a trial to investigate whether long-distance runners who consumed a high-nitrate beetroot juice supplement daily differed from those who consumed a placebo juice in relation to their aerobic endurance. To do this, he needed to standardise the runners' weekly training volume and decide how to measure his dependent variable.
Identify the independent variable and the dependent variable in this trial.
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.
