A researcher wants to find out whether there is a relationship between the time Year 10 pupils spend on their phones each evening and how tired they feel the next morning.
Outline how the two co-variables in this study could be measured.
182 exam-style questions on OCR GCSE Psychology 7.1 Planning Research, covering 7.1.1 Hypotheses, 7.1.2 Variables, 7.1.3 Experimental Designs, 7.1.4 Populations and Sampling, 7.1.5 Ethical issues, and 7.1.6 Dealing with ethical issues and BPS Code. Each one has a worked solution and a mark scheme showing where the marks go.