A psychologist asks adults to give a three-minute speech to four observers. Participants are told before the study that they may stop at any time and have their data removed.
After hearing the instructions, each participant rates their anxiety on a scale from 1, meaning not at all anxious, to 5, meaning extremely anxious. The table shows how many participants began the study and how many withdrew before completing the speech.
| Anxiety rating | Number who began | Number who withdrew |
|---|---|---|
| 1–2 | 10 | 1 |
| 3 | 10 | 3 |
| 4–5 | 10 | 7 |
Using the information in the table, explain one weakness of relying on the right to withdraw in this 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.