A psychologist investigated the effect of diet on concentration. Group 1 consumed a high-sugar energy drink at 8:00 AM and completed a concentration task. Group 2 consumed a sugar-free alternative at 4:00 PM and completed the same concentration task.
Identify one variable that might have been a confounding variable in this study. Justify your answer.
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.
