A psychologist plans to investigate whether a written strategy hint changes the time adults take to complete a route-finding puzzle. One set of adults will receive the hint and a separate set will receive neutral instructions. Each adult will attempt the puzzle once.
Explain one limitation this allocation creates when recruiting the adults and one strength it creates when preparing suitable puzzle sheets.
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.