Table 1.
Effort to complete search tasks and evaluate results.
| Task | Minimum (IQRa) | Average (IQR) | Maximum (IQR) |
| Search time per document collection/database, minutes | 20 (10-30) | 60 (27.5-150) | 228 (86-480) |
| Search task completion time, hours | 1 (0.5-2) | 4 (2-6.5) | 14 (7-30) |
| Strategy lines per search task, n | 5 (2.8-10) | 15 (9.1-30) | 59 (30-105) |
| Results examined from a search task, n | 10 (5-32) | 175 (75-500) | 850 (400-5250) |
| Time to assess relevance of a single result/document, minutes | 1 (0.5-2) | 3 (1-5) | 10 (5-25) |
| Ideal number of search results per search task, n | 0 | 100 | 10,000 |
aIQR: interquartile range.