Table 3
Results of a Brief Usability Survey of the ISAID Indexing System
| Item | Scale | Range | Mean |
| 1. Do you think you understood what the ISAID tool is designed for? | 1 (no)–5 (yes) | 3–5 | 4.2 |
| 2. How comfortable do you feel now using the ISAID Indexing Tool? | 1 (very uncomfortable)–5 (very comfortable) | 3–5 | 4.0 |
| 3. Do you think the ISAID interface (how items were laid out) is: | 1 (very difficult to use)–5 (very easy to use) | 3–4 | 3.5 |
| 4. How easy would it be for you to use the ISAID indexing tool now on other textbook chapters? | 1 (very difficult)–5 (very easy) | 3–5 | 4.2 |
| 5. What is your estimate of the amount of important clinical knowledge in text you were able to index using ISAID? | 0–100% | 60–90% | 78% |
