A psychologist can recruit only 16 pupils for a study of proofreading. Each pupil completes one task using a plain page and another using a page with distracting borders. The psychologist chooses a repeated-measures design.
Give one advantage of this choice when recruiting pupils.
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.