A psychologist wanted to investigate the effect of sleep duration on cognitive performance. She recruited 20 university students and split them into two groups. Group A slept for 8 hours, while Group B slept for only 4 hours. The next morning, all participants completed a reaction time test (measured in milliseconds).
Write a suitable directional hypothesis for 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.
