Which of these investigations is a case study?
A psychologist records one mountain rescuer's score on a single numerical memory test.
A psychologist uses open interviews to collect accounts from 500 mountain rescuers across the UK.
A psychologist uses interviews and written logs to study one mountain rescue team in depth.
A psychologist compares the stress scores of two large existing groups of trainee rescuers.
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.