A psychologist carries out an in-depth case study of one newly qualified driving instructor. The psychologist observes one lesson each week and records the number of required teaching points covered out of 20. After five weeks, the instructor decides to start using a lesson-planning checklist.
| Period | Teaching points covered out of 20 in each lesson |
|---|---|
| Before using the checklist | 13, 15, 12, 14, 16 |
| After using the checklist | 17, 15, 18, 16, 19 |
The psychologist concludes that the checklist caused the instructor to cover more teaching points.
Using the data, explain whether the psychologist's conclusion is justified.
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.