A sports psychologist investigated the relationship between reaction time and subjective mental fatigue. They measured the reaction times (in seconds) to a visual stimulus and collected self-reported mental fatigue scores (from 1 to 100) for a group of 8 elite athletes.
Complete Table 1 and calculate Spearman's rank correlation coefficient (rsr_srs) between reaction times and mental fatigue scores.
Table 1: Reaction times and mental fatigue scores with partial ranks
| Reaction time (s) | Rank 1 | Mental fatigue score | Rank 2 | Difference (ddd) | Difference squared (d2d^2d2) |
|---|---|---|---|---|---|
| 0.28 | 8 | 85 | 7 | ||
| 0.24 | 7 | 92 | 8 | ||
| 0.22 | 6 | 74 | 6 | ||
| 0.19 | 4.5 | 60 | 5 | ||
| 0.19 | 4.5 | 45 | 2 | ||
| 0.17 | 3 | 52 | 4 | ||
| 0.15 | 2 | 48 | 3 | ||
| 0.12 | 1 | 30 | 1 | ||
| 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.