A psychologist is investigating attitudes towards reading among the 360 adult members of a town library. She gives a number to every name on the library's membership list and uses a random number generator to choose 30 members. Identify the sampling method the psychologist used, and explain one limitation of using this method in her study.
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.