Dr. Aris is conducting an investigation into whether a new virtual-reality (VR) relaxation app reduces pre-operative anxiety in patients. She measures anxiety levels by recording the patients' heart rates in beats per minute (bpm) immediately before and after they use the app.
Explain one strength of Dr. Aris collecting quantitative data in this investigation.
638 exam-style questions on Edexcel A Level Psychology Methods. Each one has a worked solution and a mark scheme showing where the marks go.