Dr. Elizabeth conducted an investigation into the effectiveness of a new online cognitive training program on improving working memory capacity in older adults. She measured participants' working memory span using a standardized computerized test (scored from 1 to 15, where higher scores indicate better working memory) both before starting the training program (Condition A: Baseline) and after three weeks of daily training sessions (Condition B: 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 A: Baseline Score | Condition B: Post-training Score | Difference | Rank | Rank if positive (+) | Rank if negative (-) |
|---|---|---|---|---|---|---|
| A | 10 | 12 | ||||
| B | 8 | 8 | ||||
| C | 7 | 11 | ||||
| D | 11 | 10 | ||||
| E | 9 | 14 | ||||
| F | 12 | 9 | ||||
| G | 6 | 12 | ||||
| Total: |
Practise Edexcel A Level Psychology Methods with exam-style questions for A Level Psychology. 638 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.