A researcher observes volunteers packing food parcels at a community food bank. Two observers independently record behaviour during the same 15-minute session. The observers use the three behaviour categories shown below.
| Behaviour category | Observer 1 | Observer 2 |
|---|---|---|
| Passing an item to another volunteer | 8 | 7 |
| Completing another volunteer's packing task | 4 | 4 |
| Explaining where an item goes | 5 | 2 |
Explain what these results show about inter-rater reliability. Then explain how the behaviour category with the greatest disagreement should be revised, and one precise rule for counting the revised behaviour so that the observation could be replicated.
173 exam-style questions on OCR GCSE Psychology 7.3 Analysing Research, covering 7.3.1 Types of Data, 7.3.2 Measures of central tendency, 7.3.3 Other descriptive statistics, 7.3.4 Tables, Charts and Graphs, 7.3.5 Reliability, 7.3.6 Validity and effects on validity, and 7.3.7 Sources of bias. Each one has a worked solution and a mark scheme showing where the marks go.