A psychologist wants to investigate how often sixth-form students eat breakfast before lessons and why some students do not. In a pilot study, students completed a closed online questionnaire. They selected the number of days on which they had eaten breakfast during the previous five school days and, if necessary, selected one reason for not eating breakfast from a fixed list.
| Student group | Invitations sent | Completed questionnaires |
|---|---|---|
| Year 12 | 120 | 84 |
| Year 13 | 80 | 24 |
Evaluate whether the psychologist should use the closed online questionnaire for the full investigation. Use the pilot data in your answer.
139 exam-style questions on OCR GCSE Psychology 7.2 Doing Research, covering 7.2.1 Experiments, 7.2.2 Interviews, 7.2.3 Questionnaires (Surveys), 7.2.4 Observations, 7.2.5 Case Studies, and 7.2.6 Correlations. Each one has a worked solution and a mark scheme showing where the marks go.