A health psychologist conducted an initial study into the effects of a new digital wellbeing application on stress. They now plan to conduct a follow-up laboratory experiment to investigate whether the daily duration of using the application (15 minutes per day versus 45 minutes per day) affects participants' physiological stress levels, measured by heart rate variability (HRV) scores.
Write a suitable directional (one-tailed) experimental hypothesis for this follow-up 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.
