A cognitive psychologist investigated whether a new brain-training application improves spatial reasoning. Eight participants completed a spatial reasoning test (scored from 1 to 20, where 20 indicates excellent performance) before and after using the application for one week.
Complete Table 2 and calculate the Wilcoxon Signed Ranks T T\,T value for this study.
Table 2: Spatial reasoning scores before and after training
| Participant | Score Before Training | Score After Training | Difference | Rank of Difference (ignoring sign) | Rank if positive | Rank if negative |
|---|---|---|---|---|---|---|
| A | 11 | 15 | ||||
| B | 14 | 12 | ||||
| C | 13 | 13 | ||||
| D | 10 | 12 | ||||
| E | 16 | 11 | ||||
| F | 9 | 10 | ||||
| G | 18 | 11 | ||||
| H | 12 | 16 | ||||
| Total: |
638 exam-style questions on Edexcel A Level Psychology Methods. Each one has a worked solution and a mark scheme showing where the marks go.