Dr Elizabeth conducted an investigation into the effectiveness of a cognitive training course on working memory capacity. She measured participants' working memory capacity using a digit-span test (maximum score of 12) both before starting the course (Condition 1: Pre-training) and after completing the 4-week course (Condition 2: Post-training).
Dr Elizabeth's results are shown in Table 1 below.
Complete Table 1 and calculate the Wilcoxon Signed Ranks test statistic (TTT) for Dr Elizabeth's data.
| Participant | Condition 1: Pre-training | Condition 2: Post-training | Difference | Rank | Rank if positive (+) | Rank if negative (-) |
|---|---|---|---|---|---|---|
| A | 5 | 8 | ||||
| B | 7 | 7 | ||||
| C | 4 | 9 | ||||
| D | 8 | 6 | ||||
| E | 6 | 10 | ||||
| F | 9 | 10 | ||||
| G | 3 | 9 | ||||
| Total: |
Practise Edexcel A Level Psychology Methods with exam-style questions for A Level Psychology. 100 questions, matched to the Edexcel A Level Psychology (9PS0) specification and written in Paper 1, Paper 2 and Paper 3 style. Every question includes a full worked solution and mark scheme, so you can see where marks are awarded rather than just whether you got the answer right.