A researcher wants to compare how accurately adults identify road signs shown for two seconds in bright light and dim light. The researcher is deciding whether to use a repeated-measures design.
In terms of recruiting participants, explain one strength of using a repeated-measures design for this investigation.
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.