A psychologist investigates anxiety while participants give a short talk to a small audience. Participants are told that they may stop taking part at any point and have their data removed. During the study, several participants who report feeling most anxious choose to withdraw.
State one effect that these withdrawals could have on the generalisability of the findings.
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.