Table 8 Weighted total information area (TIA) for the OES with the 11-point item response format compared to the OES with the six derived 5-point response formats
| Â | TIA | Ratio (5-point/11-point) |
|---|---|---|
11-point | 29.52 | Â |
5-point (Option1) | 29.16 | 0.99 |
5-point (Option2) | 28.93 | 0.98 |
5-point (Option3) | 29.15 | 0.99 |
5-point (Option4) | 29.15 | 0.99 |
5-point (Option5) | 29.12 | 0.99 |
5-point (Option6) | 26.07 | 0.88 |